Submission #15982

#	Time	Username	Problem	Language	Result	Execution time	Memory
15982		gs14004	Cop and Robber (BOI14_coprobber)	C++14	100 / 100	1070 ms	8124 KiB

coprobber

#include "coprobber.h"
#include <cstdio>
#include <queue>
#include <algorithm>
#include <cstring>
using namespace std;
int indeg[500][500][2];

queue<int> qx, qy, qd;
bool vis[500][500][2];
int nxt[500][500];
int pos;

int start(int N, bool A[MAX_N][MAX_N])
{
	for (int i = 0; i < N; i++){
		for (int j = 0; j < N; j++){
			if (i == j) continue;
			indeg[i][j][1] = count(A[j], A[j] + N, 1);
			indeg[i][j][0] = 1;
		}
	}
	for (int i = 0; i < N; i++){
		for (int k = 0; k < 2; k++){
			qx.push(i);
			qy.push(i);
			qd.push(k);
			vis[i][i][k] = 1;
		}
	}
	while (!qx.empty()){
		int xf = qx.front();
		int yf = qy.front();
		int df = qd.front();
		qx.pop(), qy.pop(), qd.pop();
		if (df == 1){
			for (int i = 0; i < N; i++){
				if ((xf == i || A[xf][i]) && !vis[i][yf][0]){
					indeg[i][yf][0]--;
					if (indeg[i][yf][0] == 0){
						qx.push(i);
						qy.push(yf);
						qd.push(0);
						nxt[i][yf] = xf;
						vis[i][yf][0] = 1;
					}
				}
			}
		}
		else{
			for (int i = 0; i < N; i++){
				if (A[yf][i] &&!vis[xf][i][1]){
					indeg[xf][i][1]--;
					if (indeg[xf][i][1] == 0){
						qx.push(xf);
						qy.push(i);
						qd.push(1);
						vis[xf][i][1] = 1;
					}
				}
			}
		}
	}
	for (int i = 0; i < N; i++){
		int fnd = 0;
		for (int j = 0; j < N; j++){
			if (!vis[i][j][0]){
				fnd = 1;
				break;
			}
		}
		if (!fnd) return pos = i;
	}
	return -1;
}

int nextMove(int R)
{
	return pos = nxt[pos][R];
}

• Subtask 1: 16 / 16
• Subtask 2: 14 / 14
• Subtask 3: 30 / 30
• Subtask 4: 40 / 40