10 files changed, 22 insertions, 19 deletions
diff --git a/prolog/problems/world_data/common.py b/prolog/problems/world_data/common.py
index 0d2730a..006b9f5 100644
--- a/prolog/problems/world_data/common.py
+++ b/prolog/problems/world_data/common.py
@@ -1,2 +1,2 @@
 id = 1002
-number = 140
+number = 20
diff --git a/prolog/problems/world_data/flows_2/common.py b/prolog/problems/world_data/flows_2/common.py
index a3cf79b..a3ddc7a 100644
--- a/prolog/problems/world_data/flows_2/common.py
+++ b/prolog/problems/world_data/flows_2/common.py
@@ -6,7 +6,7 @@ from server.hints import Hint
 import server.problems
 
 id = 10009
-number = 90
+number = 55
 visible = True
 facts = 'mondial'
 
diff --git a/prolog/problems/world_data/flows_2/en.py b/prolog/problems/world_data/flows_2/en.py
index f108001..355b238 100644
--- a/prolog/problems/world_data/flows_2/en.py
+++ b/prolog/problems/world_data/flows_2/en.py
@@ -13,7 +13,7 @@ ending in the Black Sea:</p>
 <p>River data is given by the predicate</p>
 <pre>
 river(Name, FlowsToRiver, FlowsToLake, FlowsToSea, Length, Area,
-      SourceLat, SourceLon, SourceElevation, MouthLat, MouthLon).
+      SourceLat, SourceLon, SourceName, SourceElevation, MouthLat, MouthLon).
 </pre>
 '''
 
diff --git a/prolog/problems/world_data/flows_2/sl.py b/prolog/problems/world_data/flows_2/sl.py
index ef46f6b..7af2a7d 100644
--- a/prolog/problems/world_data/flows_2/sl.py
+++ b/prolog/problems/world_data/flows_2/sl.py
@@ -12,7 +12,7 @@ ki se priključi Donavi, ki teče v Črno morje, zato naj program odgovori tako:
 <p>Podatki o rekah so predstavljeni s predikatom</p>
 <pre>
 river(Name, FlowsToRiver, FlowsToLake, FlowsToSea, Length, Area,
-      SourceLat, SourceLon, SourceElevation, MouthLat, MouthLon).
+      SourceLat, SourceLon, SourceName, 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,
diff --git a/prolog/problems/world_data/grant_1/common.py b/prolog/problems/world_data/grant_1/common.py
index 8c032a3..4b5918a 100644
--- a/prolog/problems/world_data/grant_1/common.py
+++ b/prolog/problems/world_data/grant_1/common.py
@@ -5,7 +5,7 @@ from server.hints import Hint
 import server.problems
 
 id = 10007
-number = 70
+number = 45
 visible = True
 facts = 'mondial'
 
diff --git a/prolog/problems/world_data/holiday_2/en.py b/prolog/problems/world_data/holiday_2/en.py
index ecb248a..a7f4f07 100644
--- a/prolog/problems/world_data/holiday_2/en.py
+++ b/prolog/problems/world_data/holiday_2/en.py
@@ -10,7 +10,7 @@ ki ima morje.</p>
   Neighbour = 'Italy' ;
   Neighbour = 'Croatia'
 </pre>
-<p>Prav ti znajo priti podatki v obliki <code>borders(Country1, Country2, LenOfBorder)</code> in
+<p>Prav ti znajo priti podatki v obliki <code>borders(CountryCode1, CountryCode2, LenOfBorder)</code> in
 <code>geo_sea(Sea, CountryCode, Province)</code>.</p>
 '''
 
diff --git a/prolog/problems/world_data/holiday_2/sl.py b/prolog/problems/world_data/holiday_2/sl.py
index ecb248a..a7f4f07 100644
--- a/prolog/problems/world_data/holiday_2/sl.py
+++ b/prolog/problems/world_data/holiday_2/sl.py
@@ -10,7 +10,7 @@ ki ima morje.</p>
   Neighbour = 'Italy' ;
   Neighbour = 'Croatia'
 </pre>
-<p>Prav ti znajo priti podatki v obliki <code>borders(Country1, Country2, LenOfBorder)</code> in
+<p>Prav ti znajo priti podatki v obliki <code>borders(CountryCode1, CountryCode2, LenOfBorder)</code> in
 <code>geo_sea(Sea, CountryCode, Province)</code>.</p>
 '''
 
diff --git a/prolog/problems/world_data/intro_sl.html b/prolog/problems/world_data/intro_sl.html
index 2d27780..12a9701 100644
--- a/prolog/problems/world_data/intro_sl.html
+++ b/prolog/problems/world_data/intro_sl.html
@@ -36,7 +36,7 @@ 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)
+desert(Name, Area, Latitude, Longitude)
 geo_sea(Sea, CountryCode, Province)
 mergesWith(Sea1, Sea2)
 located(City, Province, CountryCode, River, Lake, Sea)
diff --git a/prolog/problems/world_data/people_in_capitals_1/common.py b/prolog/problems/world_data/people_in_capitals_1/common.py
index b38a96f..cda2e06 100644
--- a/prolog/problems/world_data/people_in_capitals_1/common.py
+++ b/prolog/problems/world_data/people_in_capitals_1/common.py
@@ -13,17 +13,17 @@ facts = 'mondial'
 solution = '''\
 people_in_capitals(N) :-
     findall(Pop,
-        (country(_,_,Capital,_,_,_),
-         city(Capital,_,_,Pop,_,_,_),
+        (country(_,ID,Capital,_,_,_),
+         city(Capital,ID,_,Pop,_,_,_),
          number(Pop)), L),
-    sum(L, N).
+    sum_list(L, N).
 '''
 
 hint_type = {
 }
 
 test_cases = [
-    ('people_in_capitals(N)', [{'N': '316277426'}]),
+    ('people_in_capitals(N)', [{'N': '313163317'}]),        # old solution without equal IDs [{'N': '316277426'}]
 ]
 
 def test(code, aux_code):
diff --git a/prolog/problems/world_data/similar_population_3/common.py b/prolog/problems/world_data/similar_population_3/common.py
index a984f1c..b8a391c 100644
--- a/prolog/problems/world_data/similar_population_3/common.py
+++ b/prolog/problems/world_data/similar_population_3/common.py
@@ -11,19 +11,22 @@ 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|_]).
+  country(X,_,_,_,_,PX),
+  country(Y,_,_,_,_,PY),
+  X \== Y,
+  D is abs(PX-PY),
+  \+ (country(Z,_,_,_,_,PZ), Z \== X, D > abs(PX-PZ)).
 '''
 
 test_cases = [
-    ('simpop(X, Y, D)',
-        [{'X': "'Grenada'", 'Y': "'Tonga'", 'D': '76'}]),
+    ("simpop('Tonga', Y, D)",
+        [{'Y': "'Grenada'", 'D': '76'}]),
     ("simpop('Slovenia', Y, D)",
         [{'Y': "'Macedonia'", 'D': '973'}]),
-    ("simpop(X, 'Australia', D)",
-        [{'X': "'Taiwan'", 'D': '180541'}]),
+    ("simpop(X, 'Slovenia', D)",
+        [{'X': "'Macedonia'", 'D': '973'}, {'X': "'Botswana'", 'D': '20593'}]),
     ("simpop(X, Y, 1176831)",
-        [{'X': "'Uzbekistan'", 'Y': "'Venezuela'"}]),
+        [{'Y': "'Uzbekistan'", 'X': "'Venezuela'"}]),
 ]
 
 def test(code, aux_code):