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답안 #218927

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
218927 2020-04-03T07:52:20 Z PeppaPig Olympic Bus (JOI20_ho_t4) C++14
100 / 100
 358 ms 3320 KB 
#include <bits/stdc++.h>

#define long long long
#define pii pair<int, int>
#define x first
#define y second

using namespace std;

const int N = 205;
const int M = 5e4+5;

int n, m;
vector<pii> g[N];
array<int, 4> E[M];

long dp[N];
priority_queue<pii, vector<pii>, greater<pii> > Q;

long dijkstra(int s, int e, int i) {
    fill_n(dp, N, 1e18);
    Q.emplace(dp[s] = 0, s);
    while(!Q.empty()) {
        pii u = Q.top(); Q.pop();
        if(dp[u.y] != u.x) continue;
        for(pii v : g[u.y]) {
            if(v.y == i) continue;
            if(u.x + E[v.y][2] < dp[v.x])
                Q.emplace(dp[v.x] = u.x + E[v.y][2], v.x);
        }
        if(u.y == E[i][1] && u.x + E[i][2] < dp[E[i][0]])
            Q.emplace(dp[E[i][0]] = u.x + E[i][2], E[i][0]);
    }
    return dp[e];
}

long ap[N][N];

int main() {
    fill_n(ap[0], N * N, 1e18);

    scanf("%d %d", &n, &m);
    for(int i = 1; i <= n; i++) ap[i][i] = 0;
    for(int i = 1, a, b, c, d; i <= m; i++) {
        scanf("%d %d %d %d", &a, &b, &c, &d);
        E[i] = {a, b, c, d};
        g[a].emplace_back(b, i);
        ap[a][b] = min(ap[a][b], (long)c);
    }
    for(int k = 1; k <= n; k++) for(int i = 1; i <= n; i++) for(int j = 1; j <= n; j++)
        ap[i][j] = min(ap[i][j], ap[i][k] + ap[k][j]);

    long ans = ap[1][n] + ap[n][1];
    for(int i = 1; i <= m; i++) {
        long d1 = min(ap[1][n], ap[1][E[i][1]] + E[i][2] + ap[E[i][0]][n]);
        long d2 = min(ap[n][1], ap[n][E[i][1]] + E[i][2] + ap[E[i][0]][1]);
        if(d1 + d2 + E[i][3] < ans) 
            ans = min(ans, dijkstra(1, n, i) + dijkstra(n, 1, i) + E[i][3]);
    }

    if(ans >= 1e18) printf("-1\n");
    else printf("%lld\n", ans);

    return 0;
}

Compilation message

ho_t4.cpp: In function 'int main()':
ho_t4.cpp:42:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
ho_t4.cpp:45:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d %d %d", &a, &b, &c, &d);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 640 KB Output is correct
2 Correct 13 ms 640 KB Output is correct
3 Correct 13 ms 768 KB Output is correct
4 Correct 14 ms 640 KB Output is correct
5 Correct 5 ms 640 KB Output is correct
6 Correct 13 ms 640 KB Output is correct
7 Correct 5 ms 640 KB Output is correct
8 Correct 4 ms 640 KB Output is correct
9 Correct 5 ms 768 KB Output is correct
10 Correct 17 ms 512 KB Output is correct
11 Correct 27 ms 640 KB Output is correct
12 Correct 16 ms 640 KB Output is correct
13 Correct 14 ms 640 KB Output is correct
14 Correct 14 ms 640 KB Output is correct
15 Correct 14 ms 640 KB Output is correct
16 Correct 14 ms 688 KB Output is correct

Subtask #2
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 46 ms 2168 KB Output is correct
2 Correct 38 ms 2048 KB Output is correct
3 Correct 42 ms 2040 KB Output is correct
4 Correct 14 ms 768 KB Output is correct
5 Correct 14 ms 640 KB Output is correct
6 Correct 14 ms 640 KB Output is correct
7 Correct 14 ms 640 KB Output is correct
8 Correct 5 ms 640 KB Output is correct
9 Correct 44 ms 2040 KB Output is correct
10 Correct 45 ms 2168 KB Output is correct
11 Correct 40 ms 2048 KB Output is correct
12 Correct 41 ms 2048 KB Output is correct
13 Correct 41 ms 2040 KB Output is correct
14 Correct 41 ms 2168 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 640 KB Output is correct
2 Correct 13 ms 640 KB Output is correct
3 Correct 32 ms 1664 KB Output is correct
4 Correct 15 ms 768 KB Output is correct
5 Correct 38 ms 2936 KB Output is correct
6 Correct 5 ms 640 KB Output is correct
7 Correct 5 ms 640 KB Output is correct
8 Correct 41 ms 2936 KB Output is correct
9 Correct 42 ms 2936 KB Output is correct
10 Correct 38 ms 2944 KB Output is correct
11 Correct 37 ms 2944 KB Output is correct
12 Correct 38 ms 3072 KB Output is correct
13 Correct 5 ms 640 KB Output is correct
14 Correct 5 ms 640 KB Output is correct
15 Correct 5 ms 640 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 5 ms 640 KB Output is correct
18 Correct 5 ms 640 KB Output is correct
19 Correct 39 ms 2936 KB Output is correct
20 Correct 37 ms 2944 KB Output is correct
21 Correct 38 ms 2936 KB Output is correct
22 Correct 37 ms 2944 KB Output is correct

Subtask #4
63.0 / 63.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 640 KB Output is correct
2 Correct 13 ms 640 KB Output is correct
3 Correct 13 ms 768 KB Output is correct
4 Correct 14 ms 640 KB Output is correct
5 Correct 5 ms 640 KB Output is correct
6 Correct 13 ms 640 KB Output is correct
7 Correct 5 ms 640 KB Output is correct
8 Correct 4 ms 640 KB Output is correct
9 Correct 5 ms 768 KB Output is correct
10 Correct 17 ms 512 KB Output is correct
11 Correct 27 ms 640 KB Output is correct
12 Correct 16 ms 640 KB Output is correct
13 Correct 14 ms 640 KB Output is correct
14 Correct 14 ms 640 KB Output is correct
15 Correct 14 ms 640 KB Output is correct
16 Correct 14 ms 688 KB Output is correct
17 Correct 46 ms 2168 KB Output is correct
18 Correct 38 ms 2048 KB Output is correct
19 Correct 42 ms 2040 KB Output is correct
20 Correct 14 ms 768 KB Output is correct
21 Correct 14 ms 640 KB Output is correct
22 Correct 14 ms 640 KB Output is correct
23 Correct 14 ms 640 KB Output is correct
24 Correct 5 ms 640 KB Output is correct
25 Correct 44 ms 2040 KB Output is correct
26 Correct 45 ms 2168 KB Output is correct
27 Correct 40 ms 2048 KB Output is correct
28 Correct 41 ms 2048 KB Output is correct
29 Correct 41 ms 2040 KB Output is correct
30 Correct 41 ms 2168 KB Output is correct
31 Correct 14 ms 640 KB Output is correct
32 Correct 13 ms 640 KB Output is correct
33 Correct 32 ms 1664 KB Output is correct
34 Correct 15 ms 768 KB Output is correct
35 Correct 38 ms 2936 KB Output is correct
36 Correct 5 ms 640 KB Output is correct
37 Correct 5 ms 640 KB Output is correct
38 Correct 41 ms 2936 KB Output is correct
39 Correct 42 ms 2936 KB Output is correct
40 Correct 38 ms 2944 KB Output is correct
41 Correct 37 ms 2944 KB Output is correct
42 Correct 38 ms 3072 KB Output is correct
43 Correct 5 ms 640 KB Output is correct
44 Correct 5 ms 640 KB Output is correct
45 Correct 5 ms 640 KB Output is correct
46 Correct 5 ms 640 KB Output is correct
47 Correct 5 ms 640 KB Output is correct
48 Correct 5 ms 640 KB Output is correct
49 Correct 39 ms 2936 KB Output is correct
50 Correct 37 ms 2944 KB Output is correct
51 Correct 38 ms 2936 KB Output is correct
52 Correct 37 ms 2944 KB Output is correct
53 Correct 38 ms 3072 KB Output is correct
54 Correct 38 ms 3064 KB Output is correct
55 Correct 40 ms 2936 KB Output is correct
56 Correct 14 ms 768 KB Output is correct
57 Correct 14 ms 768 KB Output is correct
58 Correct 36 ms 2560 KB Output is correct
59 Correct 36 ms 2560 KB Output is correct
60 Correct 36 ms 2552 KB Output is correct
61 Correct 35 ms 2560 KB Output is correct
62 Correct 65 ms 2552 KB Output is correct
63 Correct 115 ms 2680 KB Output is correct
64 Correct 88 ms 2812 KB Output is correct
65 Correct 199 ms 2816 KB Output is correct
66 Correct 358 ms 2936 KB Output is correct
67 Correct 25 ms 2684 KB Output is correct
68 Correct 44 ms 3192 KB Output is correct
69 Correct 43 ms 3192 KB Output is correct
70 Correct 41 ms 3192 KB Output is correct
71 Correct 41 ms 3200 KB Output is correct
72 Correct 41 ms 3200 KB Output is correct
73 Correct 41 ms 3320 KB Output is correct
74 Correct 41 ms 3192 KB Output is correct