Cod sursa(job #3251536)

Utilizator cris_s2Cristina Arion cris_s2 Data 26 octombrie 2024 10:50:08
Problema Algoritmul lui Dijkstra Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.91 kb
#include <bits/stdc++.h>

using namespace std;
ifstream in("dijkstra.in");
ofstream out("dijkstra.out");
vector < pair <int, int> > v[50005];
int n,m,x,y,c;
set <pair <int, int> > s;
int dist[50005];
int inf=100000;
int main()
{
    in>>n>>m;
    for(int i=1;i<=m;i++){
        in>>x>>y>>c;
        v[x].push_back({y,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) out<<"0 ";
        else out<<dist[i]<<' ';
    }
    return 0;
}