Cod sursa(job #3328016)

Utilizator matei425352Ionescu Matei Cristian matei425352 Data 5 decembrie 2025 20:59:55
Problema Algoritmul lui Dijkstra Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.13 kb
#include <bits/stdc++.h>

using namespace std;

ifstream f("dijkstra.in");
ofstream o("dijkstra.out");

const int inf=2000000000;

int n,m;
vector <pair<int,int>> v[50001];
set <pair<int,int>> s;
long long int dist[50001];

int main()
{
    f>>n>>m;
    for(int i=1;i<=m;i++){
        int x,y,cost;
        f>>x>>y>>cost;
        v[x].push_back(make_pair(y,cost));
    }
    for(int i=2;i<=n;i++)
        dist[i]=inf;
    s.insert(make_pair(0,1));
    while(!s.empty()){
        int nod=s.begin()->second;
        //int costul=s.begin()->first;
        s.erase(s.begin());
        for(int i=0;i<v[nod].size();i++){
            if(dist[v[nod][i].first]>dist[nod]+v[nod][i].second){
                if(dist[v[nod][i].first]!=inf)
                    s.erase(s.find(make_pair(dist[v[nod][i].first],v[nod][i].first)));
                dist[v[nod][i].first]=dist[nod]+v[nod][i].second;
                s.insert({dist[v[nod][i].first],v[nod][i].first});
            }
        }
    }
    for(int i=2;i<=n;i++)
        if(dist[i]!=inf)
            o<<dist[i]<<' ';
        else
            o<<0<<' ';
    return 0;
}