Submission #938637

#	Time	Username	Problem	Language	Result	Execution time	Memory
938637		faruk	Toll (BOI17_toll)	C++17	39 / 100	3036 ms	8424 KiB

toll

#include <bits/stdc++.h>
#define mp make_pair
#define all(a) a.begin(), a.end()

using namespace std;

typedef long long ll;
typedef pair<ll, ll> pii;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n, m, k, q;
    cin >> k >> n >> m >> q;
    vector<vector<pii> > graph(n + k);
    for (int i = 0; i < m; i++) {
        int f, t, p;
        cin >>f >> t >> p;
        graph[f].push_back(pii(t % k, p));
    }

    while (q--) {
        int f, t;
        cin >> f >> t;
        int SF = f / k, ST = t / k;
        vector<ll> ans(k, 1e18);
        ans[f % k] = 0;
        for (int i = SF; i < ST; i++) {
            vector<ll> neww(k, 1e18);
            for (int j = 0; j < k; j++)
                for (auto &[to, w] : graph[i * k + j])
                    neww[to] = min(neww[to], ans[j] + w);
            ans = neww;
        }

        if (ans[t % k] == 1e18)
            cout << "-1\n";
        else
            cout << ans[t % k] << "\n";
    }
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 10
• Subtask 3: 8 / 8
• Subtask 4: 31 / 31
• Subtask 5: 0 / 44