oj.uz

Submission #979202

# Submission time Handle Problem Language Result Execution time Memory
979202 2024-05-10T11:32:37 Z chautanphat Toll (BOI17_toll) C++14
46 / 100
 59 ms 83824 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
const int N = 5e4;
int k, n, m, o, cost[N][5][5], ans[__lg(N)+1][N][5][5], mask[N];
 
void dnc(int l, int r, int level = 0)
{
    if (l == r) return;
    int mid = (l+r)/2;
    
    for (int a = 0; a < k; a++)
        ans[level][mid][a][a] = 0;
    for (int i = mid-1; i >= l; i--)
        for (int a = 0; a < k; a++)
            for (int b = 0; b < k; b++)
                for (int c = 0; c < k; c++)
                    ans[level][i][a][c] = min(ans[level][i][a][c], ans[level][i+1][b][c]+cost[i][a][b]);
    for (int a = 0; a < k; a++)
        for (int b = 0; b < k; b++)
            ans[level][mid+1][a][b] = cost[mid][a][b];
    for (int i = mid+2; i <= r; i++)
        for (int a = 0; a < k; a++)
            for (int b = 0; b < k; b++)
                for (int c = 0; c < k; c++)
                    ans[level][i][c][a] = min(ans[level][i][c][a], ans[level][i-1][c][b]+cost[i-1][b][a]);

    for (int i = mid+1; i <= r; i++) mask[i] |= 1<<level;
 
    dnc(l, mid, level+1);
    dnc(mid+1, r, level+1);
}
 
int main()
{    
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    cin >> k >> n >> m >> o;
 
    for (int i = 0; i < n; i++)
        for (int a = 0; a < k; a++)
            for (int b = 0; b < k; b++)
                cost[i][a][b] = 1e9;
    for (int level = 0; (1<<level) < n; level++)
        for (int i = 0; i < n; i++)
            for (int a = 0; a < k; a++)
                for (int b = 0; b < k; b++)
                    ans[level][i][a][b] = 1e9;
 
    for (int i = 0; i < m; i++)
    {
        int a, b, t;
        cin >> a >> b >> t;
        cost[a/k][a%k][b%k] = t;
    }
 
    dnc(0, n/k);
 
    for (int i = 0; i < o; i++)
    {
        int a, b;
        cin >> a >> b;
        if (a/k == b/k)
        {
            cout << -1 << '\n';
            continue;
        }
        int level = __builtin_ctz(mask[a/k]^mask[b/k]), res = 1e9;
        for (int j = 0; j < k; j++)
            res = min(res, ans[level][a/k][a%k][j]+ans[level][b/k][j][b%k]);
        cout << (res == 1e9 ? -1 : res) << '\n';
    }
    return 0;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 83792 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 2 ms 10588 KB Output is correct
5 Correct 4 ms 23052 KB Output is correct
6 Correct 3 ms 22876 KB Output is correct
7 Correct 3 ms 22876 KB Output is correct
8 Correct 39 ms 83648 KB Output is correct
9 Correct 40 ms 83796 KB Output is correct
10 Correct 27 ms 83800 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 83732 KB Output is correct
2 Correct 1 ms 10584 KB Output is correct
3 Correct 1 ms 10588 KB Output is correct
4 Correct 2 ms 10588 KB Output is correct
5 Correct 1 ms 10588 KB Output is correct
6 Correct 1 ms 10588 KB Output is correct
7 Correct 4 ms 22872 KB Output is correct
8 Correct 5 ms 23108 KB Output is correct
9 Incorrect 40 ms 83824 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 10588 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 2 ms 10588 KB Output is correct
5 Correct 1 ms 10588 KB Output is correct
6 Correct 3 ms 22876 KB Output is correct
7 Correct 4 ms 23032 KB Output is correct
8 Correct 5 ms 22876 KB Output is correct
9 Correct 4 ms 22876 KB Output is correct
10 Correct 37 ms 83628 KB Output is correct
11 Correct 43 ms 83636 KB Output is correct
12 Correct 50 ms 83548 KB Output is correct
13 Correct 54 ms 83684 KB Output is correct
14 Correct 53 ms 83628 KB Output is correct
15 Correct 49 ms 74048 KB Output is correct
16 Correct 41 ms 74060 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 10588 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 2 ms 10588 KB Output is correct
5 Correct 1 ms 10588 KB Output is correct
6 Correct 3 ms 22876 KB Output is correct
7 Correct 4 ms 23032 KB Output is correct
8 Correct 5 ms 22876 KB Output is correct
9 Correct 4 ms 22876 KB Output is correct
10 Correct 37 ms 83628 KB Output is correct
11 Correct 43 ms 83636 KB Output is correct
12 Correct 50 ms 83548 KB Output is correct
13 Correct 54 ms 83684 KB Output is correct
14 Correct 53 ms 83628 KB Output is correct
15 Correct 49 ms 74048 KB Output is correct
16 Correct 41 ms 74060 KB Output is correct
17 Correct 41 ms 83720 KB Output is correct
18 Correct 2 ms 10588 KB Output is correct
19 Correct 1 ms 10712 KB Output is correct
20 Correct 1 ms 10584 KB Output is correct
21 Correct 2 ms 10588 KB Output is correct
22 Correct 1 ms 10588 KB Output is correct
23 Correct 3 ms 22876 KB Output is correct
24 Correct 4 ms 22872 KB Output is correct
25 Correct 4 ms 22996 KB Output is correct
26 Correct 4 ms 22876 KB Output is correct
27 Correct 39 ms 83804 KB Output is correct
28 Correct 52 ms 83636 KB Output is correct
29 Correct 59 ms 83544 KB Output is correct
30 Correct 47 ms 83544 KB Output is correct

Subtask #5
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 83792 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 2 ms 10588 KB Output is correct
5 Correct 4 ms 23052 KB Output is correct
6 Correct 3 ms 22876 KB Output is correct
7 Correct 3 ms 22876 KB Output is correct
8 Correct 39 ms 83648 KB Output is correct
9 Correct 40 ms 83796 KB Output is correct
10 Correct 27 ms 83800 KB Output is correct
11 Correct 43 ms 83732 KB Output is correct
12 Correct 1 ms 10584 KB Output is correct
13 Correct 1 ms 10588 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 1 ms 10588 KB Output is correct
16 Correct 1 ms 10588 KB Output is correct
17 Correct 4 ms 22872 KB Output is correct
18 Correct 5 ms 23108 KB Output is correct
19 Incorrect 40 ms 83824 KB Output isn't correct
20 Halted 0 ms 0 KB -