Submission #703968

#	Time	Username	Problem	Language	Result	Execution time	Memory
703968		ancuber1031	Autobus (COCI22_autobus)	C++14	0 / 70	13 ms	400 KiB

Main

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define pii pair<int,int>
#define p_q priority_queue
#define endl '\n'
#define pb push_back

int n, m;

signed main() {
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    cin>>n>>m;
    vector<vector< pii > > g(n+1);
    vector<vector<int> > edge(n+1,vector<int>(n+1,1e18));
    while(m--) {
        int a, b, t;
        cin>>a>>b>>t;
        edge[a][b] = min(t,edge[a][b]);
    }
    for (int i = 1; i <= n; ++i) {
        for (int j = 1; j <= n; ++j) {
            if (edge[i][j] < 1e18) {
                g[i].pb({j,edge[i][j]});
            }
        }
    }
    int k, q; cin>>k>>q;
    while(q--) {
        int c, d; cin>>c>>d;
        vector<int> dis(n+1,1e18), vis(n+1,0), mn(n+1,1e9+5);
        dis[c] = 0;
        p_q < pair<pair<int,int>,int>,vector<pair<pair<int,int>,int> >,greater<pair<pair<int,int>,int> > > pq;
        pq.push({{0,0},c});
        while(!pq.empty()) {
            pair<pair<int,int>,int> cur = pq.top();
            pq.pop();
            if (vis[cur.second] || cur.first.second == k) continue;
            vis[cur.second] = 1;
            for (auto [v,w] : g[cur.second]) {
                if (dis[v] > dis[cur.second]+w || 
                (dis[v] == dis[cur.second]+w && cur.first.second+1 < mn[v])) {
                    dis[v] = dis[cur.second]+w;
                    mn[v] = cur.first.second+1;
                    pq.push({{dis[v],mn[v]},v});
                }
            }
        }
        if (dis[d] == 1e18) cout<<-1<<endl;
        else cout<<dis[d]<<endl;
    }
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:42:23: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   42 |             for (auto [v,w] : g[cur.second]) {
      |                       ^

• Subtask 1: 0 / 15
• Subtask 2: 0 / 15
• Subtask 3: 0 / 25
• Subtask 4: 0 / 15