From 95e2fe57f6e4639f6ae9f1fef368829d5090dbf6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ale=C5=A1=20Smodi=C5=A1?= Date: Tue, 18 Aug 2015 16:06:19 +0200 Subject: Exported all problems from the SQLite database into the new directory structure. --- .../prog_listswap_3/common.py | 24 ++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 prolog/problems/denotational_semantics/prog_listswap_3/common.py (limited to 'prolog/problems/denotational_semantics/prog_listswap_3/common.py') diff --git a/prolog/problems/denotational_semantics/prog_listswap_3/common.py b/prolog/problems/denotational_semantics/prog_listswap_3/common.py new file mode 100644 index 0000000..110890d --- /dev/null +++ b/prolog/problems/denotational_semantics/prog_listswap_3/common.py @@ -0,0 +1,24 @@ +id = 174 +group = 'denotational_semantics' +number = 80 +visible = True +facts = 'denotational_semantics_aux__predicates' + +solution = '''\ +prog_listswap(In-->Out) --> + [begin], instructs174((In,1)-->(Out,_)), [end]. + +instructs174((R0,C0)-->(R,C)) --> + instr174((R0,C0)-->(R,C)). +instructs174((R0,C0)-->(R,C)) --> + instr174((R0,C0)-->(R1,C1)), + instructs174((R1,C1)-->(R,C)). + +instr174((R0,C0)-->(R0,C)) --> + [left], { C0 > 1, C is C0 - 1 ; C0 =< 1, C is C0 }. +instr174((R0,C0)-->(R0,C)) --> + [right], { length(R0, LenR0), + ( C0 < LenR0, C is C0 + 1 ; C0 >= LenR0, C is C0 ) }. + +instr174((R0,C0)-->(R,C0)) --> + [swap], {swap(R0,C0,R)}.''' -- cgit v1.2.1