Submission #1307091

#	Time	Username	Problem	Language	Result	Execution time	Memory
1307091		chithanhnguyen	Toll (BOI17_toll)	C++20	100 / 100	2122 ms	6404 KiB

toll

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define ull unsigned long long
#define ld long double
#define pii pair<int, int>
#define fi first
#define se second
#define __builtin_popcount __builtin_popcountll
#define all(x) (x).begin(), (x).end()
#define BIT(x, i) (((x) >> (i)) & 1)
#define MASK(x) ((1ll << (x)))

#define debug(a, l, r) for (int _i = (l); _i <= (r); ++_i) cout << (a)[_i] << ' '; cout << '\n';

const int MAXN = 5e4 + 5;
const int INF  = 1e18 + 7;
int k, n, m, q, dp[MAXN];
vector<pii> adj[MAXN];

void init() {
    cin >> k >> n >> m >> q;
    for (int i = 1; i <= m; ++i) {
        int u, v, w; cin >> u >> v >> w;
        adj[u].push_back({v, w});
    }
}

void solve() {
    while (q--) {
        int u, v; cin >> u >> v;
        for (int i = u; i <= v; ++i) dp[i] = INF;
        dp[u] = 0;
        for (int i = u; i <= v; ++i) {
            for (auto &e : adj[i]) {
                dp[e.fi] = min(dp[e.fi], dp[i] + e.se);
            }
        }

        cout << (dp[v] == INF ? -1 : dp[v]) << '\n';
    }
}

signed main() {
    #ifdef NCTHANH
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    #endif
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr); cout.tie(nullptr);

    init();
    solve();

    return 0;
}

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