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Submission #880418

# Submission time Handle Problem Language Result Execution time Memory
880418 2023-11-29T11:49:47 Z VectorLi Toll (BOI17_toll) C++17
100 / 100
 174 ms 78936 KB 
#include <bits/stdc++.h>
#define long long long

using namespace std;

const int V = 50000, K = 16;
const int N = 5;
const int MAX = numeric_limits<int>::max();

struct Element {
    int a[N][N];
    int* operator [] (int i) {
        return a[i];
    }
    Element() {
        for (int i = 0; i < N; i++) {
            fill(a[i], a[i] + N, MAX);
            a[i][i] = 0;
        }
    }
};

Element operator + (Element &u, Element &v) {
    Element w;
    for (int i = 0; i < N; i++) {
        fill(w[i], w[i] + N, MAX);
    }
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            for (int k = 0; k < N; k++) {
                if (u[i][k] < MAX && v[k][j] < MAX) {
                    w[i][j] = min(w[i][j], u[i][k] + v[k][j]);
                }
            }
        }
    }
    return w;
}

int n, m, k, q;
Element f[K][V];

void solve() {
    cin >> k >> n >> m >> q;
    for (int u = 0; u < n / k; u++) {
        for (int i = 0; i < N; i++) {
            fill(f[0][u][i], f[0][u][i] + N, MAX);
        }
    }
    for (int i = 0; i < m; i++) {
        int u, v;
        int w;
        cin >> u >> v >> w;
        f[0][u / k][u % k][v % k] = w;
    }

    for (int i = 0; i < K - 1; i++) {
       for (int u = 0; u < n / k; u++) {
            if (u + (1 << i) >= n / k) {
                f[i + 1][u] = f[i][u];
            } else {
                f[i + 1][u] = f[i][u] + f[i][u + (1 << i)];
            }
        }
    }

    for (int i = 0; i < q; i++) {
        int u, v;
        cin >> u >> v;
        int p = u / k;
        Element x;
        for (int j = K - 1; j >= 0; j--) {
            if (p + (1 << j) <= v / k) {
                x = x + f[j][p];
                p = p + (1 << j);
            }
        }
        if (x[u % k][v % k] < MAX) {
            cout << x[u % k][v % k] << "\n";
        } else {
            cout << -1 << "\n";
        }
    }
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    solve();
    return 0;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 174 ms 78760 KB Output is correct
2 Correct 17 ms 78680 KB Output is correct
3 Correct 18 ms 78580 KB Output is correct
4 Correct 17 ms 78684 KB Output is correct
5 Correct 20 ms 78680 KB Output is correct
6 Correct 20 ms 78684 KB Output is correct
7 Correct 20 ms 78684 KB Output is correct
8 Correct 153 ms 78716 KB Output is correct
9 Correct 150 ms 78684 KB Output is correct
10 Correct 133 ms 78712 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 102 ms 78712 KB Output is correct
2 Correct 25 ms 78684 KB Output is correct
3 Correct 17 ms 78684 KB Output is correct
4 Correct 17 ms 78684 KB Output is correct
5 Correct 18 ms 78672 KB Output is correct
6 Correct 17 ms 78680 KB Output is correct
7 Correct 29 ms 78736 KB Output is correct
8 Correct 28 ms 78740 KB Output is correct
9 Correct 142 ms 78708 KB Output is correct
10 Correct 103 ms 78720 KB Output is correct
11 Correct 104 ms 78772 KB Output is correct
12 Correct 82 ms 78932 KB Output is correct
13 Correct 61 ms 78684 KB Output is correct
14 Correct 72 ms 78936 KB Output is correct
15 Correct 53 ms 78680 KB Output is correct
16 Correct 54 ms 78684 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 78680 KB Output is correct
2 Correct 17 ms 78684 KB Output is correct
3 Correct 17 ms 78684 KB Output is correct
4 Correct 17 ms 78680 KB Output is correct
5 Correct 17 ms 78544 KB Output is correct
6 Correct 19 ms 78492 KB Output is correct
7 Correct 18 ms 78684 KB Output is correct
8 Correct 20 ms 78576 KB Output is correct
9 Correct 19 ms 78684 KB Output is correct
10 Correct 144 ms 78712 KB Output is correct
11 Correct 90 ms 78712 KB Output is correct
12 Correct 76 ms 78684 KB Output is correct
13 Correct 83 ms 78680 KB Output is correct
14 Correct 76 ms 78684 KB Output is correct
15 Correct 48 ms 78680 KB Output is correct
16 Correct 49 ms 78680 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 78680 KB Output is correct
2 Correct 17 ms 78684 KB Output is correct
3 Correct 17 ms 78684 KB Output is correct
4 Correct 17 ms 78680 KB Output is correct
5 Correct 17 ms 78544 KB Output is correct
6 Correct 19 ms 78492 KB Output is correct
7 Correct 18 ms 78684 KB Output is correct
8 Correct 20 ms 78576 KB Output is correct
9 Correct 19 ms 78684 KB Output is correct
10 Correct 144 ms 78712 KB Output is correct
11 Correct 90 ms 78712 KB Output is correct
12 Correct 76 ms 78684 KB Output is correct
13 Correct 83 ms 78680 KB Output is correct
14 Correct 76 ms 78684 KB Output is correct
15 Correct 48 ms 78680 KB Output is correct
16 Correct 49 ms 78680 KB Output is correct
17 Correct 100 ms 78712 KB Output is correct
18 Correct 17 ms 78680 KB Output is correct
19 Correct 17 ms 78680 KB Output is correct
20 Correct 18 ms 78680 KB Output is correct
21 Correct 18 ms 78684 KB Output is correct
22 Correct 21 ms 78528 KB Output is correct
23 Correct 22 ms 78540 KB Output is correct
24 Correct 21 ms 78568 KB Output is correct
25 Correct 21 ms 78680 KB Output is correct
26 Correct 21 ms 78692 KB Output is correct
27 Correct 143 ms 78720 KB Output is correct
28 Correct 82 ms 78676 KB Output is correct
29 Correct 106 ms 78728 KB Output is correct
30 Correct 81 ms 78684 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 174 ms 78760 KB Output is correct
2 Correct 17 ms 78680 KB Output is correct
3 Correct 18 ms 78580 KB Output is correct
4 Correct 17 ms 78684 KB Output is correct
5 Correct 20 ms 78680 KB Output is correct
6 Correct 20 ms 78684 KB Output is correct
7 Correct 20 ms 78684 KB Output is correct
8 Correct 153 ms 78716 KB Output is correct
9 Correct 150 ms 78684 KB Output is correct
10 Correct 133 ms 78712 KB Output is correct
11 Correct 102 ms 78712 KB Output is correct
12 Correct 25 ms 78684 KB Output is correct
13 Correct 17 ms 78684 KB Output is correct
14 Correct 17 ms 78684 KB Output is correct
15 Correct 18 ms 78672 KB Output is correct
16 Correct 17 ms 78680 KB Output is correct
17 Correct 29 ms 78736 KB Output is correct
18 Correct 28 ms 78740 KB Output is correct
19 Correct 142 ms 78708 KB Output is correct
20 Correct 103 ms 78720 KB Output is correct
21 Correct 104 ms 78772 KB Output is correct
22 Correct 82 ms 78932 KB Output is correct
23 Correct 61 ms 78684 KB Output is correct
24 Correct 72 ms 78936 KB Output is correct
25 Correct 53 ms 78680 KB Output is correct
26 Correct 54 ms 78684 KB Output is correct
27 Correct 17 ms 78680 KB Output is correct
28 Correct 17 ms 78684 KB Output is correct
29 Correct 17 ms 78684 KB Output is correct
30 Correct 17 ms 78680 KB Output is correct
31 Correct 17 ms 78544 KB Output is correct
32 Correct 19 ms 78492 KB Output is correct
33 Correct 18 ms 78684 KB Output is correct
34 Correct 20 ms 78576 KB Output is correct
35 Correct 19 ms 78684 KB Output is correct
36 Correct 144 ms 78712 KB Output is correct
37 Correct 90 ms 78712 KB Output is correct
38 Correct 76 ms 78684 KB Output is correct
39 Correct 83 ms 78680 KB Output is correct
40 Correct 76 ms 78684 KB Output is correct
41 Correct 48 ms 78680 KB Output is correct
42 Correct 49 ms 78680 KB Output is correct
43 Correct 100 ms 78712 KB Output is correct
44 Correct 17 ms 78680 KB Output is correct
45 Correct 17 ms 78680 KB Output is correct
46 Correct 18 ms 78680 KB Output is correct
47 Correct 18 ms 78684 KB Output is correct
48 Correct 21 ms 78528 KB Output is correct
49 Correct 22 ms 78540 KB Output is correct
50 Correct 21 ms 78568 KB Output is correct
51 Correct 21 ms 78680 KB Output is correct
52 Correct 21 ms 78692 KB Output is correct
53 Correct 143 ms 78720 KB Output is correct
54 Correct 82 ms 78676 KB Output is correct
55 Correct 106 ms 78728 KB Output is correct
56 Correct 81 ms 78684 KB Output is correct
57 Correct 99 ms 78744 KB Output is correct
58 Correct 156 ms 78932 KB Output is correct
59 Correct 109 ms 78680 KB Output is correct