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Submission #331722

# Submission time Handle Problem Language Result Execution time Memory
331722 2020-11-29T18:35:27 Z rqi Cop and Robber (BOI14_coprobber) C++14
100 / 100
 896 ms 9708 KB 
#include "coprobber.h"
#include <bits/stdc++.h>
using namespace std;

typedef pair<int, int> pi;

#define mp make_pair
#define f first
#define s second
#define sz(x) (int)(x).size()

const int mx = 505;

int N;

pair<bool, int> dp[mx][mx][2];
int curdeg[mx][mx];
queue<pair<pi, bool>> q; 

int curpos = 0;

int start(int _N, bool A[MAX_N][MAX_N])
{
	N = _N;
	for(int i = 0; i < N; i++){
		A[i][i] = 1;
		dp[i][i][0] = dp[i][i][1] = mp(1, -1);
		q.push(mp(mp(i, i), 0)); q.push(mp(mp(i, i), 1));
	}
	for(int i = 0; i < N; i++){
		int deg = 0;
		for(int j = 0; j < N; j++){
			if(j == i) continue;
			if(A[j][i]){
				deg++;
			}
		}
		for(int j = 0; j < N; j++){
			curdeg[j][i] = deg;
		}
	}

	while(sz(q)){
		pair<pi, bool> qf = q.front();
		q.pop();
		int a = qf.f.f;
		int b = qf.f.s;
		int turn = qf.s;

		if(turn == 0){ //police's turn is a win
			for(int i = 0; i < N; i++){
				if(i == b) continue;
				if(A[i][b] && !dp[a][i][1].f){
					curdeg[a][i]--;

					if(curdeg[a][i] == 0){
						dp[a][i][1] = mp(1, b);
						q.push(mp(mp(a, i), 1));
					}
				}
			}
		}
		else{ //robber's turn is a win
			for(int i = 0; i < N; i++){
				if(A[i][a] && !dp[i][b][0].f){
					dp[i][b][0] = mp(1, a);
					q.push(mp(mp(i, b), 0));
				}
			}
		}
	}

	// for(int i = 0; i < N; i++){
	// 	for(int j = 0; j < N; j++){
	// 		for(int k = 0; k < 2; k++){
	// 			cout << i << " " << j << " " << k << " " << dp[i][j][k].f << " " << dp[i][j][k].s << "\n";
	// 		}
	// 	}
	// }
	// cout << "\n\n";

	for(int i = 0; i < N; i++){
		bool works = 1;
		for(int j = 0; j < N; j++){
			if(!dp[i][j][0].f) works = 0;
		}
		if(works){
			curpos = i;
			return i;
		}
	}
    return -1;
}

int nextMove(int R)
{
    curpos = dp[curpos][R][0].s;
    return curpos;
}

Subtask #1
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 458 ms 6744 KB Output is correct
5 Correct 58 ms 3308 KB Output is correct
6 Correct 514 ms 7020 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 442 ms 6664 KB Output is correct
4 Correct 442 ms 6764 KB Output is correct
5 Correct 478 ms 6752 KB Output is correct
6 Correct 459 ms 6652 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 0 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 2 ms 1132 KB Output is correct
11 Correct 4 ms 1132 KB Output is correct
12 Correct 1 ms 492 KB Output is correct
13 Correct 2 ms 876 KB Output is correct
14 Correct 4 ms 1132 KB Output is correct
15 Correct 2 ms 748 KB Output is correct
16 Correct 2 ms 748 KB Output is correct
17 Correct 9 ms 1388 KB Output is correct
18 Correct 2 ms 1004 KB Output is correct
19 Correct 1 ms 364 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 458 ms 6744 KB Output is correct
5 Correct 58 ms 3308 KB Output is correct
6 Correct 514 ms 7020 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 442 ms 6664 KB Output is correct
10 Correct 442 ms 6764 KB Output is correct
11 Correct 478 ms 6752 KB Output is correct
12 Correct 459 ms 6652 KB Output is correct
13 Correct 0 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 492 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 0 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 492 KB Output is correct
22 Correct 2 ms 1132 KB Output is correct
23 Correct 4 ms 1132 KB Output is correct
24 Correct 1 ms 492 KB Output is correct
25 Correct 2 ms 876 KB Output is correct
26 Correct 4 ms 1132 KB Output is correct
27 Correct 2 ms 748 KB Output is correct
28 Correct 2 ms 748 KB Output is correct
29 Correct 9 ms 1388 KB Output is correct
30 Correct 2 ms 1004 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 1 ms 364 KB Output is correct
33 Correct 0 ms 364 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 447 ms 6892 KB Output is correct
36 Correct 58 ms 3308 KB Output is correct
37 Correct 493 ms 6960 KB Output is correct
38 Correct 0 ms 364 KB Output is correct
39 Correct 1 ms 492 KB Output is correct
40 Correct 445 ms 6764 KB Output is correct
41 Correct 440 ms 6764 KB Output is correct
42 Correct 427 ms 6668 KB Output is correct
43 Correct 451 ms 6636 KB Output is correct
44 Correct 0 ms 364 KB Output is correct
45 Correct 1 ms 364 KB Output is correct
46 Correct 1 ms 364 KB Output is correct
47 Correct 1 ms 492 KB Output is correct
48 Correct 2 ms 1132 KB Output is correct
49 Correct 4 ms 1132 KB Output is correct
50 Correct 1 ms 492 KB Output is correct
51 Correct 2 ms 876 KB Output is correct
52 Correct 4 ms 1132 KB Output is correct
53 Correct 2 ms 748 KB Output is correct
54 Correct 2 ms 748 KB Output is correct
55 Correct 9 ms 1388 KB Output is correct
56 Correct 2 ms 1004 KB Output is correct
57 Correct 6 ms 2156 KB Output is correct
58 Correct 22 ms 4332 KB Output is correct
59 Correct 37 ms 5612 KB Output is correct
60 Correct 778 ms 9708 KB Output is correct
61 Correct 153 ms 6124 KB Output is correct
62 Correct 140 ms 6380 KB Output is correct
63 Correct 632 ms 8608 KB Output is correct
64 Correct 167 ms 6252 KB Output is correct
65 Correct 740 ms 9520 KB Output is correct
66 Correct 495 ms 7196 KB Output is correct
67 Correct 896 ms 8452 KB Output is correct
68 Correct 363 ms 6080 KB Output is correct
69 Correct 1 ms 364 KB Output is correct