summaryrefslogtreecommitdiff
path: root/python/problems/recursion/binary
diff options
context:
space:
mode:
authorMartin Možina <martin.mozina@fri.uni-lj.si>2016-10-11 14:39:50 +0200
committerMartin Možina <martin.mozina@fri.uni-lj.si>2016-10-11 14:39:50 +0200
commit29bc34810cb1d1fbd208f6b5f2dad73188ca7f12 (patch)
tree0501d9274c6f87aa8a0aa4d273c364f0923d9063 /python/problems/recursion/binary
parent8fd61c5d99aee8bf08871d306f1392b1bebd97aa (diff)
- new exercises on recursion
- added text (lectures) on conditions and loops
Diffstat (limited to 'python/problems/recursion/binary')
-rw-r--r--python/problems/recursion/binary/common.py75
-rw-r--r--python/problems/recursion/binary/en.py13
-rw-r--r--python/problems/recursion/binary/sl.py30
3 files changed, 118 insertions, 0 deletions
diff --git a/python/problems/recursion/binary/common.py b/python/problems/recursion/binary/common.py
new file mode 100644
index 0000000..585c5ff
--- /dev/null
+++ b/python/problems/recursion/binary/common.py
@@ -0,0 +1,75 @@
+import re
+from python.util import has_token_sequence, string_almost_equal, \
+ string_contains_number, get_tokens, get_numbers, get_exception_desc, \
+ all_tokens, has_comprehension, has_loop, almost_equal, get_ast
+from server.hints import Hint
+
+id = 20808
+number = 8
+visible = True
+
+solution = '''\
+def binary(n):
+ if n <= 1:
+ return str(n)
+ return binary(n // 2) + str(n % 2)
+'''
+
+hint_type = {
+ 'final_hint': Hint('final_hint'),
+ 'has_loop': Hint('has_loop')
+}
+
+def test(python, code, aux_code=''):
+ func_name = 'binary'
+ tokens = get_tokens(code)
+ ast = get_ast(code)
+ if not has_token_sequence(tokens, ['def', func_name]):
+ return False, [{'id' : 'no_func_name', 'args' : {'func_name' : func_name}}]
+
+ in_out = [
+ (3, '11'),
+ (2, '10'),
+ (1, '1'),
+ (0, '0'),
+ (42, '101010')
+ ]
+
+ test_in = [('{0}({1})'.format(func_name, str(l[0])), None)
+ for l in in_out]
+ test_out = [l[1] for l in in_out]
+
+ answers = python(code=aux_code+code, inputs=test_in, timeout=1.0)
+ n_correct = 0
+ tin, tout = None, None
+ for i, (ans, to) in enumerate(zip(answers, test_out)):
+ res = ans[0]
+ corr = res == to
+ n_correct += corr
+ if not corr:
+ tin = test_in[i][0]
+ tout = to
+
+ passed = n_correct == len(test_in)
+ hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_in)}}]
+ if tin:
+ hints.append({'id': 'problematic_test_case', 'args': {'testin': str(tin), 'testout': str(tout)}})
+ if passed:
+ if has_loop(ast):
+ hints.append({'id': 'has_loop'})
+ else:
+ hints.append({'id': 'final_hint'})
+
+
+ return passed, hints
+
+
+def hint(python, code, aux_code=''):
+ tokens = get_tokens(code)
+
+ # run one test first to see if there are any exceptions
+ answer = python(code=aux_code+code, inputs=[(None, None)], timeout=1.0)
+ exc = get_exception_desc(answer[0][3])
+ if exc: return exc
+
+ return None
diff --git a/python/problems/recursion/binary/en.py b/python/problems/recursion/binary/en.py
new file mode 100644
index 0000000..01440f7
--- /dev/null
+++ b/python/problems/recursion/binary/en.py
@@ -0,0 +1,13 @@
+id = 20808
+name = 'Binary'
+
+description = '''\
+<p>(translation missing)</p>'''
+
+hint = {
+ 'plan': '''\
+<p>(translation missing)</p>''',
+
+ 'no_input_call': '''\
+<p>(translation missing)</p>''',
+}
diff --git a/python/problems/recursion/binary/sl.py b/python/problems/recursion/binary/sl.py
new file mode 100644
index 0000000..8360a46
--- /dev/null
+++ b/python/problems/recursion/binary/sl.py
@@ -0,0 +1,30 @@
+import server
+mod = server.problems.load_language('python', 'sl')
+
+id = 20808
+name = 'Binarno'
+
+description = '''\
+<p>
+Napiši rekurzivno funkcijo <code>binary(n)</code>, ki kot argument prejme število
+<code>n</code> in kot rezultat vrne niz s tem številom v dvojiškem zapisu. </p>
+
+<pre>
+>>> binary(42)
+'101010'
+</pre>
+'''
+
+plan = []
+
+hint = {
+ 'final_hint': ['''\
+<p>Program je pravilen! <br>
+</p>
+'''],
+
+ 'has_loop': ['''\
+<p>Program sicer deluje pravilno, vendar vsebuje zanko.
+</p>
+'''],
+}