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Submission #1003876

# Submission time Handle Problem Language Result Execution time Memory
1003876 2024-06-20T19:30:50 Z tien_07 Toll (BOI17_toll) C++17
0 / 100
 50 ms 120156 KB 
#include <bits/stdc++.h>
using namespace std;

int k,n,m,q;
int dp[50000][17][6][6], ans[6][6], tmp[6][6];

void combine(int target[6][6], int a[6][6], int b[6][6]) {
	for (int x = 0; x < k; x++) {
		for (int y = 0; y < k; y++) {
			for (int z = 0; z < k; z++) {
				target[x][y] = min(target[x][y], a[x][z] + b[z][y]);
			}
		}
	}
}

void solve() {
    cin >> k >> n >> m >> q;
	memset(dp, 0x3f, sizeof dp);
	while (m--) {
		int a, b, t;
		cin >> a >> b >> t;
		dp[a / k][0][a % k][b % k] = t;
	}

    for(int j = 1; j < 17; j++){
		for (int i = 0; i + (1 << j) < (n + k - 1) / k; i++) {
			combine(dp[i][j], dp[i][j - 1], dp[i + (1<<j) -1][j - 1]);
		}
	}

    while (q--) {
		int a, b;
		cin >> a >> b;
		memset(ans, 0x3f, sizeof ans);
		for (int i = 0; i < 5; i++) ans[i][i] = 0;
		for (int curr = a / k, dest = b / k, i = 16; ~i; i--) {
			if (curr + (1 << i) <= dest) {
				memset(tmp, 0x3f, sizeof tmp);
				combine(tmp, ans, dp[curr][i]);
				memcpy(ans, tmp, sizeof ans);
				curr += (1 << i);
			}
		}
		cout << (ans[a % k][b % k] >= 0x3f3f3f3f ? -1 : ans[a % k][b % k]) << '\n';
	}
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    //freopen(TASK ".inp", "r", stdin);
    //freopen(TASK ".out", "w", stdout);
    int tc = 1; //cin >> tc;
    while (tc--) solve();
    return 0;
}

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 36 ms 120152 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 50 ms 120156 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 16 ms 120156 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 31.0

# Verdict Execution time Memory Grader output
1 Incorrect 16 ms 120156 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 44.0

# Verdict Execution time Memory Grader output
1 Incorrect 36 ms 120152 KB Output isn't correct
2 Halted 0 ms 0 KB -