Submission #406412

#	Time	Username	Problem	Language	Result	Execution time	Memory
406412		Jarif_Rahman	Robot (JOI21_ho_t4)	C++17	0 / 100	262 ms	21940 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<tuple<ll, int, int, ll, int>> pq;
    dis[0] = 0;
    pq.push({0, 0, -1, -1, -1});
    while(!pq.empty()){
        auto [ig, nd, cl, pr, nd0] = pq.top(); 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-(cl==c && x!=nd0)*(pr));
            if(dis[nd]+w < dis[x]){
                dis[x] = dis[nd]+w;
                pq.push({-dis[x], x, c, w, nd});
            }
        }
    }
    cout << (dis[n-1]==inf?-1:dis[n-1]) << "\n";
}

• Subtask 1: 0 / 34
• Subtask 2: 0 / 24
• Subtask 3: 0 / 42