Cod sursa(job #3251550)

Utilizator lucatanasegLuca-Tanase Grindean lucatanaseg Data 26 octombrie 2024 10:59:14
Problema Algoritmul lui Dijkstra Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.99 kb
#include <bits/stdc++.h>

using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");

#define inf 1000000000
int dist[50005];
vector<pair<int, int>> v[50005];
set<pair<int, int>> s;
int n, m;
int main()
{
    fin>>n>>m;
    for(int i=1; i<=m; i++){
        int x, y, c;
        fin>>x>>y>>c;
        v[x].push_back({y, c});
        //pt neorientat facem si v[y].push_back({x, c});
    }
    dist[1]=0;
    for(int i=2; i<=n; i++) dist[i]=inf;
    s.insert({0, 1});
    while(!s.empty()){
        int nod=s.begin()->second;
        s.erase(s.begin());
        for(auto ed : v[nod]){
            if(dist[ed.first] > dist[nod] + ed.second){
                s.erase({dist[ed.first], ed.first});
                dist[ed.first] = dist[nod] + ed.second;
                s.insert({dist[ed.first], ed.first});
            }
        }
    }
    for(int i=2; i<=n; i++){
        if(dist[i]==inf) fout<<0<<' ';
        else fout<<dist[i]<<' ';
    }

    return 0;
}