제출 #118697

#제출 시각아이디문제언어결과실행 시간메모리
118697onjo0127경찰관과 강도 (BOI14_coprobber)C++11
100 / 100
761 ms10888 KiB
#include "coprobber.h" #include <bits/stdc++.h> using namespace std; using tiii = tuple<int, int, int>; int now, n, D[MAX_N][MAX_N][2], deg[MAX_N][MAX_N][2], W[MAX_N][MAX_N]; bool adj[MAX_N][MAX_N], vs[MAX_N][MAX_N]; int start(int N, bool A[MAX_N][MAX_N]) { n = N; memset(W, -1, sizeof(W)); for(int i=0; i<n; i++) for(int j=0; j<n; j++) D[i][j][0] = D[i][j][1] = 1; for(int i=0; i<n; i++) for(int j=0; j<n; j++) adj[i][j] = A[i][j], deg[0][i][0] += A[i][j], deg[i][j][1] = 1; for(int i=1; i<n; i++) for(int j=0; j<n; j++) deg[i][j][0] = deg[0][j][0]; for(int i=0; i<n; i++) deg[i][i][0] = deg[i][i][1] = 0; queue<tiii> que; for(int i=0; i<n; i++) { que.push((tiii){i, i, 0}); que.push((tiii){i, i, 1}); } while(que.size()) { int c, r, t; tie(c, r, t) = que.front(); que.pop(); D[c][r][t] = 0; if(t == 0) { for(int i=0; i<n; i++) { if(adj[r][i] && --deg[c][i][0] == 0) que.push((tiii){c, i, 1}); } } else { for(int i=0; i<n; i++) { if((adj[c][i] || i == c) && --deg[i][r][1] == 0) { que.push((tiii){i, r, 0}); W[i][r] = c; } } } } for(int i=0; i<n; i++) { bool fl = 1; for(int j=0; j<n; j++) if(D[i][j][0] == 1) fl = 0; if(fl) return now = i; } return -1; } bool chk(int v, int R) { for(int i=0; i<n; i++) if(adj[R][i] && vs[v][i]) return 0; return 1; } int nextMove(int R) { return now = W[now][R]; vs[now][R] = 1; if(D[now][R][1] == 0 && chk(now, R)) return now; for(int i=0; i<n; i++) { if(adj[now][i] && D[i][R][1] == 0 && chk(i, R)) return now = i; } return -1; }
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