Merge branch 'master' of 192.168.15.97:codeq-problems

43 files changed, 808 insertions, 12 deletions

diff --git a/prolog/problems/algol/common.py b/prolog/problems/algol/common.py
index 2885432..0085483 100644
--- a/prolog/problems/algol/common.py
+++ b/prolog/problems/algol/common.py
@@ -1,2 +1,2 @@
 id = 1001
-number = 12
+number = 130
diff --git a/prolog/problems/clp_fd/common.py b/prolog/problems/clp_fd/common.py
index eec07f0..4f3096c 100644
--- a/prolog/problems/clp_fd/common.py
+++ b/prolog/problems/clp_fd/common.py
@@ -1,2 +1,2 @@
 id = 8
-number = 9
+number = 100
diff --git a/prolog/problems/clp_r/common.py b/prolog/problems/clp_r/common.py
index 2238250..fe95da6 100644
--- a/prolog/problems/clp_r/common.py
+++ b/prolog/problems/clp_r/common.py
@@ -1,2 +1,2 @@
 id = 9
-number = 8
+number = 90
diff --git a/prolog/problems/dcg/common.py b/prolog/problems/dcg/common.py
index a55cdef..8a0f57f 100644
--- a/prolog/problems/dcg/common.py
+++ b/prolog/problems/dcg/common.py
@@ -1,2 +1,2 @@
 id = 10
-number = 10
+number = 110
diff --git a/prolog/problems/denotational_semantics/common.py b/prolog/problems/denotational_semantics/common.py
index 86c7532..9e282d0 100644
--- a/prolog/problems/denotational_semantics/common.py
+++ b/prolog/problems/denotational_semantics/common.py
@@ -1,2 +1,2 @@
 id = 11
-number = 11
+number = 120
diff --git a/prolog/problems/family_relations/common.py b/prolog/problems/family_relations/common.py
index 5aff819..611c856 100644
--- a/prolog/problems/family_relations/common.py
+++ b/prolog/problems/family_relations/common.py
@@ -1,2 +1,2 @@
 id = 1
-number = 1
+number = 10
diff --git a/prolog/problems/license_plates/common.py b/prolog/problems/license_plates/common.py
index e35a349..42bf4e7 100644
--- a/prolog/problems/license_plates/common.py
+++ b/prolog/problems/license_plates/common.py
@@ -1,2 +1,2 @@
 id = 7
-number = 7
+number = 80
diff --git a/prolog/problems/lists/common.py b/prolog/problems/lists/common.py
index 4788fc4..ed64b41 100644
--- a/prolog/problems/lists/common.py
+++ b/prolog/problems/lists/common.py
@@ -1,2 +1,2 @@
 id = 2
-number = 2
+number = 30
diff --git a/prolog/problems/lists_advanced/common.py b/prolog/problems/lists_advanced/common.py
index d4e77fa..f25a4a0 100644
--- a/prolog/problems/lists_advanced/common.py
+++ b/prolog/problems/lists_advanced/common.py
@@ -1,2 +1,2 @@
 id = 1000
-number = 3
+number = 40
diff --git a/prolog/problems/sets/common.py b/prolog/problems/sets/common.py
index b3335ec..1110721 100644
--- a/prolog/problems/sets/common.py
+++ b/prolog/problems/sets/common.py
@@ -1,2 +1,2 @@
 id = 5
-number = 5
+number = 60
diff --git a/prolog/problems/sorting/common.py b/prolog/problems/sorting/common.py
index 4e5aa88..cbe679b 100644
--- a/prolog/problems/sorting/common.py
+++ b/prolog/problems/sorting/common.py
@@ -1,2 +1,2 @@
 id = 3
-number = 4
+number = 50
diff --git a/prolog/problems/trees/common.py b/prolog/problems/trees/common.py
index 9cf57f5..7a974d4 100644
--- a/prolog/problems/trees/common.py
+++ b/prolog/problems/trees/common.py
@@ -1,2 +1,2 @@
 id = 6
-number = 6
+number = 70
diff --git a/prolog/problems/world_data/all_capitals_1/common.py b/prolog/problems/world_data/all_capitals_1/common.py
new file mode 100644
index 0000000..490c183
--- /dev/null
+++ b/prolog/problems/world_data/all_capitals_1/common.py
@@ -0,0 +1,44 @@
+from operator import itemgetter
+import socket
+import prolog.engine
+import prolog.util
+from server.hints import Hint
+import server.problems
+
+id = 10002
+number = 20
+visible = True
+facts = 'mondial'
+
+solution = '''\
+all_capitals(List) :-
+    findall(Capital, country(_, _, Capital, _, _, _), List).
+'''
+
+hint_type = {
+}
+
+test_cases = [
+    ('all_capitals(X), length(X, L)', [{'L': '244'}]),
+]
+
+def test(code, aux_code):
+    n_correct = 0
+    engine_id = None
+    try:
+        engine_id, output = prolog.engine.create(code=code+aux_code, timeout=5.0)
+        if engine_id is not None and 'error' not in map(itemgetter(0), output):
+            # Engine successfully created, and no syntax error in program.
+            for query, answers in test_cases:
+                if prolog.engine.check_answers(engine_id, query=query, answers=answers, timeout=1.0, inference_limit=None):
+                    n_correct += 1
+    except socket.timeout:
+        pass
+    finally:
+        if engine_id:
+            prolog.engine.destroy(engine_id)
+
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
+    if n_correct == len(test_cases):
+        hints += [{'id': 'final_hint'}]
+    return n_correct, len(test_cases), hints
diff --git a/prolog/problems/world_data/all_capitals_1/en.py b/prolog/problems/world_data/all_capitals_1/en.py
new file mode 100644
index 0000000..92eb2b2
--- /dev/null
+++ b/prolog/problems/world_data/all_capitals_1/en.py
@@ -0,0 +1,13 @@
+name = 'all_capitals/1'
+slug = 'capital cities'
+
+description = '''\
+<p><code>all_capitals(List)</code>: <code>List</code> is a list of all capitals in the world.</p>
+<pre>
+?- all_capitals(List).
+  List = ['Tirana', 'Athina', 'Skopje', 'Beograd', …]
+</pre>
+<p>Useful facts are given as <code>country(Name, ID, Capital, CapitalProvince, Size, Population)</code>.</p>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/all_capitals_1/sl.py b/prolog/problems/world_data/all_capitals_1/sl.py
new file mode 100644
index 0000000..cf3413f
--- /dev/null
+++ b/prolog/problems/world_data/all_capitals_1/sl.py
@@ -0,0 +1,13 @@
+name = 'all_capitals/1'
+slug = 'glavna mesta'
+
+description = '''\
+<p><code>all_capitals(List)</code>: <code>List</code> je seznam vseh glavnih mest na svetu.</p>
+<pre>
+?- all_capitals(List).
+  List = ['Tirana', 'Athina', 'Skopje', 'Beograd', …]
+</pre>
+<p>Uporabna dejstva so podana v obliki <code>country(Name, ID, Capital, CapitalProvince, Size, Population)</code>.</p>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/capital_2/common.py b/prolog/problems/world_data/capital_2/common.py
new file mode 100644
index 0000000..76fb985
--- /dev/null
+++ b/prolog/problems/world_data/capital_2/common.py
@@ -0,0 +1,52 @@
+from operator import itemgetter
+import socket
+import prolog.engine
+import prolog.util
+from server.hints import Hint
+import server.problems
+
+id = '10001'
+number = 10
+visible = True
+facts = 'mondial'
+
+solution = '''\
+capital(Country, Capital) :-
+    country(Country, _, Capital, _, _, _).
+'''
+
+hint_type = {
+}
+
+test_cases = [
+    ("capital('France', X)", [{'X': "'Paris'"}]),
+    ("capital('Turkmenistan', X)", [{'X': "'Ashgabat'"}]),
+    ("capital('Cocos Islands', X)", [{'X': "'West Island'"}]),
+    ("capital(X, 'Basseterre')", [{'X': "'Saint Kitts and Nevis'"}]),
+    ("capital(X, X)",
+        [{'X': "'Luxembourg'"}, {'X': "'Monaco'"}, {'X': "'Gibraltar'"},
+         {'X': "'Ceuta'"}, {'X': "'Melilla'"}, {'X': "'San Marino'"},
+         {'X': "'Hong Kong'"}, {'X': "'Macao'"}, {'X': "'Singapore'"},
+         {'X': "'Djibouti'"}]),
+]
+
+def test(code, aux_code):
+    n_correct = 0
+    engine_id = None
+    try:
+        engine_id, output = prolog.engine.create(code=code+aux_code, timeout=5.0)
+        if engine_id is not None and 'error' not in map(itemgetter(0), output):
+            # Engine successfully created, and no syntax error in program.
+            for query, answers in test_cases:
+                if prolog.engine.check_answers(engine_id, query=query, answers=answers, timeout=1.0, inference_limit=None):
+                    n_correct += 1
+    except socket.timeout:
+        pass
+    finally:
+        if engine_id:
+            prolog.engine.destroy(engine_id)
+
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
+    if n_correct == len(test_cases):
+        hints += [{'id': 'final_hint'}]
+    return n_correct, len(test_cases), hints
diff --git a/prolog/problems/world_data/capital_2/en.py b/prolog/problems/world_data/capital_2/en.py
new file mode 100644
index 0000000..5ecd2ab
--- /dev/null
+++ b/prolog/problems/world_data/capital_2/en.py
@@ -0,0 +1,13 @@
+name = 'capital/2'
+slug = 'capitals'
+
+description = '''\
+<p><code>capital(X, Y)</code>: <code>Y</code> is the capital city of country <code>X</code>.</p>
+<pre>
+?- capital('Ireland', M).
+  Y = 'Dublin'.
+</pre>
+<p>Useful facts are given as <code>country(Name, ID, Capital, CapitalProvince, Size, Population)</code>.</p>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/capital_2/sl.py b/prolog/problems/world_data/capital_2/sl.py
new file mode 100644
index 0000000..7b14a70
--- /dev/null
+++ b/prolog/problems/world_data/capital_2/sl.py
@@ -0,0 +1,13 @@
+name = 'capital/2'
+slug = 'glavna mesta'
+
+description = '''\
+<p><code>capital(X, Y)</code>: država <code>X</code> ima glavno mesto <code>Y</code>.</p>
+<pre>
+?- capital('Ireland', Y).
+  Y = 'Dublin'.
+</pre>
+<p>Uporabna dejstva so podana v obliki <code>country(Name, ID, Capital, CapitalProvince, Size, Population)</code>.</p>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/common.py b/prolog/problems/world_data/common.py
new file mode 100644
index 0000000..006b9f5
--- /dev/null
+++ b/prolog/problems/world_data/common.py
@@ -0,0 +1,2 @@
+id = 1002
+number = 20
diff --git a/prolog/problems/world_data/en.py b/prolog/problems/world_data/en.py
new file mode 100644
index 0000000..3d3cbaf
--- /dev/null
+++ b/prolog/problems/world_data/en.py
@@ -0,0 +1,8 @@
+name = 'The World Factbook'
+description = '''\
+<p>
+Let's ask prolog some questions about our world, e.g. through which countries a given river flows or which
+two countries are most similar in terms of the size of their populations. For this purpose a database
+containing facts about the world has been loaded. The database comes from the almanac "The World Factbook".
+</p>
+'''
diff --git a/prolog/problems/world_data/flows_2/common.py b/prolog/problems/world_data/flows_2/common.py
new file mode 100644
index 0000000..a3cf79b
--- /dev/null
+++ b/prolog/problems/world_data/flows_2/common.py
@@ -0,0 +1,51 @@
+from operator import itemgetter
+import socket
+import prolog.engine
+import prolog.util
+from server.hints import Hint
+import server.problems
+
+id = 10009
+number = 90
+visible = True
+facts = 'mondial'
+
+solution = '''\
+flows(River, Sea) :-
+    river(River, _, _, Sea, _, _, _, _, _, _, _, _),
+    Sea \= null.
+flows(River, Sea) :-
+    river(River, River2, _, _, _, _, _, _, _, _, _, _),
+    River2 \= null,
+    flows(River2, Sea).
+'''
+
+hint_type = {
+}
+
+test_cases = [
+    ("flows('Rhone', X)", [{'X': "'Mediterranean Sea'"}]),
+    ("flows(X, 'Java Sea')", [{'X': "'Mahakam'"}, {'X': "'Barito'"}]),
+    ("flows('Drau', X)", [{'X': "'Black Sea'"}]),
+]
+
+def test(code, aux_code):
+    n_correct = 0
+    engine_id = None
+    try:
+        engine_id, output = prolog.engine.create(code=code+aux_code, timeout=5.0)
+        if engine_id is not None and 'error' not in map(itemgetter(0), output):
+            # Engine successfully created, and no syntax error in program.
+            for query, answers in test_cases:
+                if prolog.engine.check_answers(engine_id, query=query, answers=answers, timeout=2.0, inference_limit=None):
+                    n_correct += 1
+    except socket.timeout:
+        pass
+    finally:
+        if engine_id:
+            prolog.engine.destroy(engine_id)
+
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
+    if n_correct == len(test_cases):
+        hints += [{'id': 'final_hint'}]
+    return n_correct, len(test_cases), hints
diff --git a/prolog/problems/world_data/flows_2/en.py b/prolog/problems/world_data/flows_2/en.py
new file mode 100644
index 0000000..f108001
--- /dev/null
+++ b/prolog/problems/world_data/flows_2/en.py
@@ -0,0 +1,20 @@
+name = 'flows/2'
+slug = ''
+
+description = '''\
+<p><code>flows(X, Y)</code>: the river <code>X</code> flows to sea <code>Y</code>.
+The predicate should follow the flow from <code>X</code> through different rivers
+until it reaches a sea - for example, Drina flows into Save, which flows into Donau,
+ending in the Black Sea:</p>
+<pre>
+?- flows('Drina', Y).
+  Y = 'Black Sea'.
+</pre>
+<p>River data is given by the predicate</p>
+<pre>
+river(Name, FlowsToRiver, FlowsToLake, FlowsToSea, Length, Area,
+      SourceLat, SourceLon, SourceElevation, MouthLat, MouthLon).
+</pre>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/flows_2/sl.py b/prolog/problems/world_data/flows_2/sl.py
new file mode 100644
index 0000000..ef46f6b
--- /dev/null
+++ b/prolog/problems/world_data/flows_2/sl.py
@@ -0,0 +1,34 @@
+name = 'flows/2'
+slug = ''
+
+description = '''\
+<p><code>flows(X, Y)</code>: reka <code>X</code> se izliva v morje <code>Y</code>.
+Predikat naj sledi toku skozi različne reke - Drina se npr. priključi Savi,
+ki se priključi Donavi, ki teče v Črno morje, zato naj program odgovori tako:</p>
+<pre>
+?- flows('Drina', Y).
+  Y = 'Black Sea'.
+</pre>
+<p>Podatki o rekah so predstavljeni s predikatom</p>
+<pre>
+river(Name, FlowsToRiver, FlowsToLake, FlowsToSea, Length, Area,
+      SourceLat, SourceLon, SourceElevation, MouthLat, MouthLon).
+</pre>
+<p>Za vsako reko je podan največ en izmed argumentov <code>FlowsToRiver</code>,
+<code>FlowsToLake</code> in <code>FlowsToSea</code>, ki pove, v katero reko,
+jezero oziroma morje se izliva; ostala dva argumenta pa sta <code>null</code>.
+'''
+
+plan = [
+    '''\
+<p>Reke, ki se izlivajo neposredno v morje, lahko dobimo s poizvedbo:</p>
+<pre>
+?- river(River, _, _, Sea, _, _, _, _, _, _, _, _), Sea \= null.
+  River = 'Thjorsa', Sea = 'Atlantic Ocean' ;
+  River = 'Thames', Sea = 'North Sea' ;
+  …
+</pre>
+''',
+]
+
+hint = {}
diff --git a/prolog/problems/world_data/grant_1/common.py b/prolog/problems/world_data/grant_1/common.py
new file mode 100644
index 0000000..8c032a3
--- /dev/null
+++ b/prolog/problems/world_data/grant_1/common.py
@@ -0,0 +1,50 @@
+from operator import itemgetter
+import socket
+import prolog.engine
+from server.hints import Hint
+import server.problems
+
+id = 10007
+number = 70
+visible = True
+facts = 'mondial'
+
+solution = '''\
+grant(Loc):-
+  (city(Loc, _, _, _, Lat, _, _)
+   ;
+   island(Loc, _, _, _, _, Lat, _)),
+  number(Lat),
+  Lat > -38,
+  Lat < -36.
+'''
+
+test_cases = [
+    ("grant(Loc)",
+        [{'Loc': "'Melbourne'"}, {'Loc': "'Auckland'"}, {'Loc': "'Hamilton'"}, {'Loc': "'Santa Rosa'"},
+         {'Loc': "'Concepción'"}, {'Loc': "'Talcahuano'"}, {'Loc': "'Tristan Da Cunha'"}]),
+    ("\+ grant('Ljubljana')",
+        [{}]),
+    ("grant('Tristan Da Cunha')",
+        [{}]),
+]
+
+def test(code, aux_code):
+    n_correct = 0
+    engine_id = None
+    try:
+        engine_id, output = prolog.engine.create(code=code+aux_code, timeout=5.0)
+        if engine_id is not None and 'error' not in map(itemgetter(0), output):
+            # Engine successfully created, and no syntax error in program.
+            for query, answers in test_cases:
+                if prolog.engine.check_answers(engine_id, query=query, answers=answers, timeout=1.0, inference_limit = None):
+                    n_correct += 1
+    except socket.timeout:
+        pass
+    finally:
+        if engine_id:
+            prolog.engine.destroy(engine_id)
+
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
+    return n_correct, len(test_cases), hints
+
diff --git a/prolog/problems/world_data/grant_1/en.py b/prolog/problems/world_data/grant_1/en.py
new file mode 100644
index 0000000..20ad118
--- /dev/null
+++ b/prolog/problems/world_data/grant_1/en.py
@@ -0,0 +1,15 @@
+name = 'grant/1'
+slug = 'Otroka kapitana Granta'
+
+description = '''\
+<p>Otroka kapitana Granta, tako pravi Jules Verne, sta našla njegovo pismo v steklenici. Izgubil naj bi se v
+brodolomu nekje na morju. Vse kar vesta o njegovi lokaciji je, da leži na 37 poldnevniku južne širine. Povprašaj
+prolog v katerem mestu ali na katerem otoku se lahko nahaja, da ga rešimo. Privzemimo, da poiščemo vse
+lokacije med -36 in -38 stopinjami južne širine (minus ker je pod ekvatorjem).</p>
+<p><code>grant(Location)</code>: predikat eno po eno vrne vse lokacije <code>Location</code>, ki ustrezajo
+pogojem. <code>Location</code> predstavlja <em>ime</em> lokacije.</p>
+<p>Prav ti znajo priti podatki v obliki <code>city(Name, CountryCode, Province, Population, Latitude, Longitude,
+Elevation)</code> in <code>island(Name, Group, Area, Elevation, Type, Latitude, Longitude)</code>.</p>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/grant_1/sl.py b/prolog/problems/world_data/grant_1/sl.py
new file mode 100644
index 0000000..20ad118
--- /dev/null
+++ b/prolog/problems/world_data/grant_1/sl.py
@@ -0,0 +1,15 @@
+name = 'grant/1'
+slug = 'Otroka kapitana Granta'
+
+description = '''\
+<p>Otroka kapitana Granta, tako pravi Jules Verne, sta našla njegovo pismo v steklenici. Izgubil naj bi se v
+brodolomu nekje na morju. Vse kar vesta o njegovi lokaciji je, da leži na 37 poldnevniku južne širine. Povprašaj
+prolog v katerem mestu ali na katerem otoku se lahko nahaja, da ga rešimo. Privzemimo, da poiščemo vse
+lokacije med -36 in -38 stopinjami južne širine (minus ker je pod ekvatorjem).</p>
+<p><code>grant(Location)</code>: predikat eno po eno vrne vse lokacije <code>Location</code>, ki ustrezajo
+pogojem. <code>Location</code> predstavlja <em>ime</em> lokacije.</p>
+<p>Prav ti znajo priti podatki v obliki <code>city(Name, CountryCode, Province, Population, Latitude, Longitude,
+Elevation)</code> in <code>island(Name, Group, Area, Elevation, Type, Latitude, Longitude)</code>.</p>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/holiday_2/common.py b/prolog/problems/world_data/holiday_2/common.py
new file mode 100644
index 0000000..0ccf8c2
--- /dev/null
+++ b/prolog/problems/world_data/holiday_2/common.py
@@ -0,0 +1,49 @@
+from operator import itemgetter
+import socket
+import prolog.engine
+from server.hints import Hint
+import server.problems
+
+id = 10005
+number = 50
+visible = True
+facts = 'mondial'
+
+solution = '''\
+holiday(Country, Neighbour):-
+  country(Country,CC1,_,_,_,_),
+  (borders(CC1,CC2,_) ; borders(CC2,CC1,_)),
+  once(geo_sea(_,CC2,_)),
+  country(Neighbour,CC2,_,_,_,_).
+'''
+
+test_cases = [
+    ("holiday('Slovenia', N)",
+        [{'N': "'Italy'"}, {'N': "'Croatia'"}]),
+    ("holiday(C, 'Canada')",
+        [{'C': "'United States'"}]),
+    ("holiday('Venezuela', 'Guyana')",
+        [{}]),
+    ("\+ holiday('Uzbekistan', _)",
+        [{}]),
+]
+
+def test(code, aux_code):
+    n_correct = 0
+    engine_id = None
+    try:
+        engine_id, output = prolog.engine.create(code=code+aux_code, timeout=5.0)
+        if engine_id is not None and 'error' not in map(itemgetter(0), output):
+            # Engine successfully created, and no syntax error in program.
+            for query, answers in test_cases:
+                if prolog.engine.check_answers(engine_id, query=query, answers=answers, timeout=1.0, inference_limit = None):
+                    n_correct += 1
+    except socket.timeout:
+        pass
+    finally:
+        if engine_id:
+            prolog.engine.destroy(engine_id)
+
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
+    return n_correct, len(test_cases), hints
+
diff --git a/prolog/problems/world_data/holiday_2/en.py b/prolog/problems/world_data/holiday_2/en.py
new file mode 100644
index 0000000..ecb248a
--- /dev/null
+++ b/prolog/problems/world_data/holiday_2/en.py
@@ -0,0 +1,17 @@
+name = 'holiday/2'
+slug = 'V katero sosednjo državo gremo lahko na morje?'
+
+description = '''\
+<p>V katero <em>sosednjo</em> državo gremo lahko na morje?</p>
+<p><code>holiday(Country, Neighbour)</code>: <code>Neighbour</code> je sosednja država od <code>Country</code>,
+ki ima morje.</p>
+<pre>
+?- holiday('Slovenia', Neighbour).
+  Neighbour = 'Italy' ;
+  Neighbour = 'Croatia'
+</pre>
+<p>Prav ti znajo priti podatki v obliki <code>borders(Country1, Country2, LenOfBorder)</code> in
+<code>geo_sea(Sea, CountryCode, Province)</code>.</p>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/holiday_2/sl.py b/prolog/problems/world_data/holiday_2/sl.py
new file mode 100644
index 0000000..ecb248a
--- /dev/null
+++ b/prolog/problems/world_data/holiday_2/sl.py
@@ -0,0 +1,17 @@
+name = 'holiday/2'
+slug = 'V katero sosednjo državo gremo lahko na morje?'
+
+description = '''\
+<p>V katero <em>sosednjo</em> državo gremo lahko na morje?</p>
+<p><code>holiday(Country, Neighbour)</code>: <code>Neighbour</code> je sosednja država od <code>Country</code>,
+ki ima morje.</p>
+<pre>
+?- holiday('Slovenia', Neighbour).
+  Neighbour = 'Italy' ;
+  Neighbour = 'Croatia'
+</pre>
+<p>Prav ti znajo priti podatki v obliki <code>borders(Country1, Country2, LenOfBorder)</code> in
+<code>geo_sea(Sea, CountryCode, Province)</code>.</p>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/intro_sl.html b/prolog/problems/world_data/intro_sl.html
new file mode 100644
index 0000000..2d27780
--- /dev/null
+++ b/prolog/problems/world_data/intro_sl.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<html lang="sl">
+<head>
+  <meta charset="utf-8" />
+  <title>Prolog: države sveta</title>
+  <link rel="stylesheet" type="text/css" href="/css/codeq.css" />
+  <link rel="stylesheet" type="text/css" href="../../style.css" />
+</head>
+<body>
+
+<h1>Prolog: države sveta</h1>
+<p>
+Podatkovna baza za ta sklop vsebuje podatke o državah in geografskih
+značilnostih iz <em>CIA World Factbook</em>. Dejstva so podana z naslednjimi predikati:
+</p>
+
+<pre>
+country(Name, Code, Capital, Province, Area, Population)
+population(CountryCode, GrowthRate, Births)
+economy(CountryCode, GDP, Agriculture, Services, Industry, GDPperCapita, Inflation, Unemployment)
+language(CountryCode, Language, Percentage)
+ethnicGroup(CountryCode, Ethnicity, Percentage)
+religion(CountryCode, Religion, Percentage)
+borders(CountryCode1, CountryCode2, Length)
+continent(Name, Area)
+encompasses(CountryCode, Continent, Percentage)
+city(Name, CountryCode, Province, Population, Latitude, Longitude, Elevation)
+cityothername(Name, CountryCode, Province, OtherName)
+province(Name, CountryCode, Population, Area, Capital, CapitalProvince)
+provinceothername(Name, CountryCode, OtherName)
+sea(Name, Depth)
+river(Name, FlowsToRiver, FlowsToLake, FlowsToSea, Length, Basin,
+      SourceLatitude, SourceLongitude, SourceName, SourceElevation,
+      MouthLatitude, MouthLongitude)
+lake(Name, Area, Depth, Elevation, Type, River, Latitude, Longitude)
+riverthrough(River, Lake)
+island(Name, Group, Area, Elevation, Type, Latitude, Longitude)
+mountain(Name, Range, Height, Type, Latitude, Longitude)
+desert(Name, Area, Longitude, Latitude, Longitude)
+geo_sea(Sea, CountryCode, Province)
+mergesWith(Sea1, Sea2)
+located(City, Province, CountryCode, River, Lake, Sea)
+islandIn(Island, Sea, Lake, River)
+mountainOnIsland(Mountain, Island)
+</pre>
+
+  </body>
+</html>
diff --git a/prolog/problems/world_data/landlocked2_1/common.py b/prolog/problems/world_data/landlocked2_1/common.py
new file mode 100644
index 0000000..3c5b3e2
--- /dev/null
+++ b/prolog/problems/world_data/landlocked2_1/common.py
@@ -0,0 +1,48 @@
+from operator import itemgetter
+import socket
+import prolog.engine
+from server.hints import Hint
+import server.problems
+
+id = 10006
+number = 60
+visible = True
+facts = 'mondial'
+
+solution = '''\
+landlocked2(Country):-
+  findall(CC, (country(_,CC,_,_,_,_), \+ geo_sea(_,CC,_)), LL),
+  member(C, LL),
+  \+ ( (borders(C,C1,_) ; borders(C1,C,_)),
+       \+ member(C1, LL) ),
+  country(Country,C,_,_,_,_).
+'''
+
+test_cases = [
+    ("landlocked2(Country)",
+        [{'Country': "'Liechtenstein'"}, {'Country': "'Uzbekistan'"}]),
+    ("\+ landlocked2('Slovenia')",
+        [{}]),
+    ("landlocked2('Uzbekistan')",
+        [{}]),
+]
+
+def test(code, aux_code):
+    n_correct = 0
+    engine_id = None
+    try:
+        engine_id, output = prolog.engine.create(code=code+aux_code, timeout=5.0)
+        if engine_id is not None and 'error' not in map(itemgetter(0), output):
+            # Engine successfully created, and no syntax error in program.
+            for query, answers in test_cases:
+                if prolog.engine.check_answers(engine_id, query=query, answers=answers, timeout=1.0, inference_limit = None):
+                    n_correct += 1
+    except socket.timeout:
+        pass
+    finally:
+        if engine_id:
+            prolog.engine.destroy(engine_id)
+
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
+    return n_correct, len(test_cases), hints
+
diff --git a/prolog/problems/world_data/landlocked2_1/en.py b/prolog/problems/world_data/landlocked2_1/en.py
new file mode 100644
index 0000000..6d69382
--- /dev/null
+++ b/prolog/problems/world_data/landlocked2_1/en.py
@@ -0,0 +1,12 @@
+name = 'landlocked2/1'
+slug = 'poišči države brez morja, ki ne mejijo na države z morjem'
+
+description = '''\
+<p>Nekatere države nimajo morja. Spet druge države imajo še manj sreče -- ne samo, da nimajo morja,
+tudi ne mejijo na nobeno državo, ki bi morje imela. Po angleško takim državam rečemo "double landlocked".</p>
+<p><code>landlocked2(Country)</code>: predikat eno po eno vrne vse države, ki nimajo ne morja, ne sosede
+z morjem.</p>
+<p>Prav ti znajo priti podatki v obliki <code>geo_sea(Sea, CountryCode, Province)</code>.</p>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/landlocked2_1/sl.py b/prolog/problems/world_data/landlocked2_1/sl.py
new file mode 100644
index 0000000..6d69382
--- /dev/null
+++ b/prolog/problems/world_data/landlocked2_1/sl.py
@@ -0,0 +1,12 @@
+name = 'landlocked2/1'
+slug = 'poišči države brez morja, ki ne mejijo na države z morjem'
+
+description = '''\
+<p>Nekatere države nimajo morja. Spet druge države imajo še manj sreče -- ne samo, da nimajo morja,
+tudi ne mejijo na nobeno državo, ki bi morje imela. Po angleško takim državam rečemo "double landlocked".</p>
+<p><code>landlocked2(Country)</code>: predikat eno po eno vrne vse države, ki nimajo ne morja, ne sosede
+z morjem.</p>
+<p>Prav ti znajo priti podatki v obliki <code>geo_sea(Sea, CountryCode, Province)</code>.</p>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/people_in_capitals_1/common.py b/prolog/problems/world_data/people_in_capitals_1/common.py
new file mode 100644
index 0000000..b38a96f
--- /dev/null
+++ b/prolog/problems/world_data/people_in_capitals_1/common.py
@@ -0,0 +1,48 @@
+from operator import itemgetter
+import socket
+import prolog.engine
+import prolog.util
+from server.hints import Hint
+import server.problems
+
+id = 10003
+number = 30
+visible = True
+facts = 'mondial'
+
+solution = '''\
+people_in_capitals(N) :-
+    findall(Pop,
+        (country(_,_,Capital,_,_,_),
+         city(Capital,_,_,Pop,_,_,_),
+         number(Pop)), L),
+    sum(L, N).
+'''
+
+hint_type = {
+}
+
+test_cases = [
+    ('people_in_capitals(N)', [{'N': '316277426'}]),
+]
+
+def test(code, aux_code):
+    n_correct = 0
+    engine_id = None
+    try:
+        engine_id, output = prolog.engine.create(code=code+aux_code, timeout=5.0)
+        if engine_id is not None and 'error' not in map(itemgetter(0), output):
+            # Engine successfully created, and no syntax error in program.
+            for query, answers in test_cases:
+                if prolog.engine.check_answers(engine_id, query=query, answers=answers, timeout=1.0, inference_limit=None):
+                    n_correct += 1
+    except socket.timeout:
+        pass
+    finally:
+        if engine_id:
+            prolog.engine.destroy(engine_id)
+
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
+    if n_correct == len(test_cases):
+        hints += [{'id': 'final_hint'}]
+    return n_correct, len(test_cases), hints
diff --git a/prolog/problems/world_data/people_in_capitals_1/en.py b/prolog/problems/world_data/people_in_capitals_1/en.py
new file mode 100644
index 0000000..1c8b93d
--- /dev/null
+++ b/prolog/problems/world_data/people_in_capitals_1/en.py
@@ -0,0 +1,11 @@
+name = 'people_in_capitals/1'
+slug = 'number of people living in capitals'
+
+description = '''\
+<p><code>people_in_capitals(N)</code>: <code>N</code> is the total number of people living in capital cities of the world.</p>
+<p>Useful predicates:</p>
+<li><code>country(Name, ID, Capital, CapitalProvince, Size, Population)</code></li>
+<li><code>city(Name, Country ID, Province, Population, Lat, Lon, Elevation)</code>.</li>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/people_in_capitals_1/sl.py b/prolog/problems/world_data/people_in_capitals_1/sl.py
new file mode 100644
index 0000000..a72ba5e
--- /dev/null
+++ b/prolog/problems/world_data/people_in_capitals_1/sl.py
@@ -0,0 +1,11 @@
+name = 'people_in_capitals/1'
+slug = 'število prebivalcev glavnih mest'
+
+description = '''\
+<p><code>people_in_capitals(N)</code>: <code>N</code> je število ljudi, ki živijo v glavnih mestih po svetu.</p>
+<p>Uporabni predikati:</p>
+<li><code>country(Name, ID, Capital, CapitalProvince, Size, Population)</code></li>
+<li><code>city(Name, Country ID, Province, Population, Lat, Lon, Elevation)</code>.</li>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/similar_population_3/common.py b/prolog/problems/world_data/similar_population_3/common.py
new file mode 100644
index 0000000..a984f1c
--- /dev/null
+++ b/prolog/problems/world_data/similar_population_3/common.py
@@ -0,0 +1,47 @@
+from operator import itemgetter
+import socket
+import prolog.engine
+from server.hints import Hint
+import server.problems
+
+id = 10008
+number = 80
+visible = True
+facts = 'mondial'
+
+solution = '''\
+simpop(X, Y, D):-
+  findall(D/X/Y, (country(X,_,_,_,_,PX), country(Y,_,_,_,_,PY), X \== Y, D is abs(PX-PY)), L),
+  sort(L, [D/X/Y|_]).
+'''
+
+test_cases = [
+    ('simpop(X, Y, D)',
+        [{'X': "'Grenada'", 'Y': "'Tonga'", 'D': '76'}]),
+    ("simpop('Slovenia', Y, D)",
+        [{'Y': "'Macedonia'", 'D': '973'}]),
+    ("simpop(X, 'Australia', D)",
+        [{'X': "'Taiwan'", 'D': '180541'}]),
+    ("simpop(X, Y, 1176831)",
+        [{'X': "'Uzbekistan'", 'Y': "'Venezuela'"}]),
+]
+
+def test(code, aux_code):
+    n_correct = 0
+    engine_id = None
+    try:
+        engine_id, output = prolog.engine.create(code=code+aux_code, timeout=5.0)
+        if engine_id is not None and 'error' not in map(itemgetter(0), output):
+            # Engine successfully created, and no syntax error in program.
+            for query, answers in test_cases:
+                if prolog.engine.check_answers(engine_id, query=query, answers=answers, timeout=1.0, inference_limit = None):
+                    n_correct += 1
+    except socket.timeout:
+        pass
+    finally:
+        if engine_id:
+            prolog.engine.destroy(engine_id)
+
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
+    return n_correct, len(test_cases), hints
+
diff --git a/prolog/problems/world_data/similar_population_3/en.py b/prolog/problems/world_data/similar_population_3/en.py
new file mode 100644
index 0000000..e9c2516
--- /dev/null
+++ b/prolog/problems/world_data/similar_population_3/en.py
@@ -0,0 +1,15 @@
+name = 'simpop/3'
+slug = 'countries with most similar number of residents'
+
+description = '''\
+<p><code>simpop(X, Y, Diff)</code>: <code>X</code> and <code>Y</code> are countries with the most similar numbers of
+residents. <code>Diff</code> represents the difference between them.</p>
+<pre>
+?- simpop('Fiji', Y, Diff).
+  Y = 'Cyprus',
+  Diff = 20152.
+</pre>
+<p>Useful facts are given as <code>country(Name, ID, Capital, CapitalProvince, Size, Population).</code></p>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/similar_population_3/sl.py b/prolog/problems/world_data/similar_population_3/sl.py
new file mode 100644
index 0000000..069f35e
--- /dev/null
+++ b/prolog/problems/world_data/similar_population_3/sl.py
@@ -0,0 +1,15 @@
+name = 'simpop/3'
+slug = 'državi z najbolj podobnim številom prebivalcev'
+
+description = '''\
+<p><code>simpop(X, Y, Diff)</code>: <code>X</code> in <code>Y</code> je par držav z najbolj podobnim številom
+prebivalcev, <code>Diff</code> je razlika med njima.</p>
+<pre>
+?- simpop('Fiji', Y, Diff).
+  Y = 'Cyprus',
+  Diff = 20152.
+</pre>
+<p>Uporabna dejstva so podana v obliki <code>country(Name, ID, Capital, CapitalProvince, Size, Population).</code></p>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/sl.py b/prolog/problems/world_data/sl.py
new file mode 100644
index 0000000..9796f98
--- /dev/null
+++ b/prolog/problems/world_data/sl.py
@@ -0,0 +1,10 @@
+name = 'Države sveta'
+description = '''\
+<p>
+Naučimo se vprašati prolog po različnih dejstvih o našem svetu, npr. skozi
+katere države teče neka reka ali kateri dve državi sta si čimbolj podobni po
+številu prebivalcev. Za ta namen je naložena
+<a target="_blank" href="[%@resource intro_sl.html%]">baza podatkov</a>
+iz almanaha svetovnih dejstev "The World Factbook".
+</p>
+'''
diff --git a/prolog/problems/world_data/whoSpeaks_3/common.py b/prolog/problems/world_data/whoSpeaks_3/common.py
new file mode 100644
index 0000000..79e4410
--- /dev/null
+++ b/prolog/problems/world_data/whoSpeaks_3/common.py
@@ -0,0 +1,47 @@
+from operator import itemgetter
+import socket
+import prolog.engine
+from server.hints import Hint
+import server.problems
+
+id = 10004
+number = 40
+visible = True
+facts = 'mondial'
+
+solution = '''\
+whoSpeaks(Lang, Country, Num):-
+  language(CC, Lang, Perc),
+  country(Country, CC, _, _, _, Pop),
+  Num is Pop*Perc/100.
+'''
+
+test_cases = [
+    ("whoSpeaks('Dutch', Country, _)",
+        [{'Country': "'Belgium'"}, {'Country': "'Netherlands'"}, {'Country': "'Monaco'"},
+         {'Country': "'Curacao'"}, {'Country': "'Sint Maarten'"}]),
+    ("whoSpeaks('Slovenian', 'Slovenia', Num)",
+        [{'Num': '1873527.11'}]),
+    ("\+ whoSpeaks('Italian', 'Uzbekistan', _)",
+        [{}]),
+]
+
+def test(code, aux_code):
+    n_correct = 0
+    engine_id = None
+    try:
+        engine_id, output = prolog.engine.create(code=code+aux_code, timeout=5.0)
+        if engine_id is not None and 'error' not in map(itemgetter(0), output):
+            # Engine successfully created, and no syntax error in program.
+            for query, answers in test_cases:
+                if prolog.engine.check_answers(engine_id, query=query, answers=answers, timeout=1.0, inference_limit = None):
+                    n_correct += 1
+    except socket.timeout:
+        pass
+    finally:
+        if engine_id:
+            prolog.engine.destroy(engine_id)
+
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
+    return n_correct, len(test_cases), hints
+
diff --git a/prolog/problems/world_data/whoSpeaks_3/en.py b/prolog/problems/world_data/whoSpeaks_3/en.py
new file mode 100644
index 0000000..3dc74e6
--- /dev/null
+++ b/prolog/problems/world_data/whoSpeaks_3/en.py
@@ -0,0 +1,23 @@
+name = 'whoSpeaks/3'
+slug = 'poišči države v katerih govorijo določen jezik'
+
+description = '''\
+<p>Določen jezik ne govorijo nujno samo v eni državi. Pravzaprav za večino jezikov velja, da jih govorijo
+v več državah na svetu. Napiši predikat, ki ugotovi v katerih državah govorijo določen jezik in koliko je
+ljudi, ki ga govorijo. Morda te rezultati presenetijo!</p>
+<p><code>whoSpeaks(Lang, Country, NumOfSpeakers)</code>: predikat eno po eno vrne vse države <code>Country</code>
+v kateri govorijo jezik <code>Lang</code> in obenem vrne tudi koliko ljudi </code>NumOfSpeakers</code> v tej državi
+govori ta jezik.</p>
+<pre>
+?- whoSpeaks('Spanish', Country, NumOfSpeakers).
+  Country = 'Spain', NumOfSpeakers = 34643777 ;
+  Country = 'Andorra', NumOfSpeakers = 25777 ;
+  Country = 'Belize', NumOfSpeakers = 143966 ;
+  ...
+</pre>
+<p>Prav ti znajo priti podatki v obliki <code>language(CountryCode, Language, PercentageOfSpeakers)</code>.</p>
+<p>S pomočjo napisanega predikata lahko hitro ugotoviš v koliko državah govorijo nek jezik ali v kateri državi je
+najbolj pogost. Lahko poskusiš postaviti ustrezno vprašanje prologu v konzoli.</p>
+'''
+
+hint = {}
diff --git a/prolog/problems/world_data/whoSpeaks_3/sl.py b/prolog/problems/world_data/whoSpeaks_3/sl.py
new file mode 100644
index 0000000..3dc74e6
--- /dev/null
+++ b/prolog/problems/world_data/whoSpeaks_3/sl.py
@@ -0,0 +1,23 @@
+name = 'whoSpeaks/3'
+slug = 'poišči države v katerih govorijo določen jezik'
+
+description = '''\
+<p>Določen jezik ne govorijo nujno samo v eni državi. Pravzaprav za večino jezikov velja, da jih govorijo
+v več državah na svetu. Napiši predikat, ki ugotovi v katerih državah govorijo določen jezik in koliko je
+ljudi, ki ga govorijo. Morda te rezultati presenetijo!</p>
+<p><code>whoSpeaks(Lang, Country, NumOfSpeakers)</code>: predikat eno po eno vrne vse države <code>Country</code>
+v kateri govorijo jezik <code>Lang</code> in obenem vrne tudi koliko ljudi </code>NumOfSpeakers</code> v tej državi
+govori ta jezik.</p>
+<pre>
+?- whoSpeaks('Spanish', Country, NumOfSpeakers).
+  Country = 'Spain', NumOfSpeakers = 34643777 ;
+  Country = 'Andorra', NumOfSpeakers = 25777 ;
+  Country = 'Belize', NumOfSpeakers = 143966 ;
+  ...
+</pre>
+<p>Prav ti znajo priti podatki v obliki <code>language(CountryCode, Language, PercentageOfSpeakers)</code>.</p>
+<p>S pomočjo napisanega predikata lahko hitro ugotoviš v koliko državah govorijo nek jezik ali v kateri državi je
+najbolj pogost. Lahko poskusiš postaviti ustrezno vprašanje prologu v konzoli.</p>
+'''
+
+hint = {}