题目 Katu Puzzle is presented as a directed graph G(V, E) with each edge e(a, b) labeled by a boolean operator op (one of AND, OR, XOR) and an integer c (0 ≤ c ≤ 1). One Katu is solvable if one can find each vertex Vi a value Xi (0 ≤ Xi ≤ 1) such that…

Katu Puzzle Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 6714   Accepted: 2472 Description Katu Puzzle is presented as a directed graph G(V, E) with each edge e(a, b) labeled by a boolean operator op (one of AND, OR, XOR) and an integ…

http://poj.org/problem?id=3678 总觉得这题比例题简单. 设a为x取0的点,a+n为x取1的点. 我们还是定义a到b表示取a必须取b. 那么我们有: 当AND: 1.当c=1:add(a,a+n); add(b,b+n);//我们不能取0的点,所以我们让程序一旦取0必会矛盾,下面类似的同理. 2.当c=0:add(a+n,b); add(b+n,a); 当OR 1.当c=1:add(a,b+n);add(b,a+n); 2.当c=0:add(a+n,a);add(b+…

题目链接:http://poj.org/problem?id=3678 分别对and,or,xor推出相对应的逻辑关系: 逻辑关系 1 0  A and B     A'->A,B'->B A->B',B->A' A or B   A'->B',B'->A A->A',B->B' A xor B     A'->B,B'->A,A->B',B->A' A->B,A'->B' //STATUS:C++_AC_96MS_472…

原题链接 \(2-SAT\)模板题. 将\(AND,OR,XOR\)转换成\(2-SAT\)的命题形式连边,用\(tarjan\)求强连通分量并检验即可. #include<cstdio> using namespace std; const int N = 2010; const int M = 4e6 + 10; int fi[N], di[M], ne[M], dfn[N], low[N], st[N], bl[N], l, tp, ti, SCC; bool v[N]; inline…

Katu Puzzle Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 9987   Accepted: 3741 Description Katu Puzzle is presented as a directed graph G(V, E) with each edge e(a, b) labeled by a boolean operator op (one of AND, OR, XOR) and an integ…

Description Katu Puzzle ≤ c ≤ ). One Katu ≤ Xi ≤ ) such that for each edge e(a, b) labeled by op and c, the following formula holds: Xa op Xb = c The calculating rules are: AND 0 1 0 0 0 1 0 1 OR 0 1 0 0 1 1 1 1 XOR 0 1 0 0 1 1 1 0 Given a Katu Puzzl…

Description Katu Puzzle is presented as a directed graph G(V, E) with each edge e(a, b) labeled by a boolean operator op (one of AND, OR, XOR) and an integer c (0 ≤ c ≤ 1). One Katu is solvable if one can find each vertex Vi a value Xi (0 ≤ Xi ≤ 1) s…

                                                                     Katu Puzzle Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 11429   Accepted: 4233 Description Katu Puzzle is presented as a directed graph G(V, E) with each edge e(a, …

Katu Puzzle Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 6553   Accepted: 2401 Description Katu Puzzle is presented as a directed graph G(V, E) with each edge e(a, b) labeled by a boolean operator op (one of AND, OR, XOR) and an integ…