제출 #405920

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
405920		Jarif_Rahman	Robot (JOI21_ho_t4)	C++17	0 / 100	287 ms	20496 KiB

Main

#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;
const ll inf = 1e18;
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, m; cin >> n >> m;
    vector<vector<tuple<int, int, ll>>> v(n);
    for(int i = 0; i < m; i++){
        int a, b, c; ll p; cin >> a >> b >> c >> p; a--, b--, c--;;
        v[a].pb({b, c, p});
        v[b].pb({a, c, p});
    }
    vector<ll> dis(n, inf);
    vector<bool> bl(n, 0);
    priority_queue<pair<ll, int>> pq;
    dis[0] = 0;
    pq.push({0, 0});
    while(!pq.empty()){
        int nd = pq.top().sc; pq.pop();
        if(bl[nd]) continue;
        bl[nd] = 1;
        map<int, ll> mp;
        for(auto [x, c, p]: v[nd]) mp[c]+=p;
        for(auto [x, c, p]: v[nd]){
            ll w = min(p, mp[c]-p);
            if(dis[nd]+w < dis[x]){
                dis[x] = dis[nd]+w;
                pq.push({-dis[x], x});
            }
        }
    }
    cout << (dis[n-1]==inf?-1:dis[n-1]) << "\n";
}

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