Cod sursa(job #3366054)

Utilizator AlexandruCorneaCornea Alexandru Mihai AlexandruCornea Data 28 septembrie 2026 19:18:15
Problema Algoritmul lui Dijkstra Scor 50
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.09 kb
#include <bits/stdc++.h>
using namespace std;

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

int n,m,d[50001],viz[50001];
vector<pair<int,int>> v[50001];

void citire()
{
    fin>>n>>m;

    for(int i=1; i<=m; i++)
    {
        int x,y,c;
        fin>>x>>y>>c;
        v[x].push_back({y,c});
    }
}

void rezolvare()
{
    const int INF=1e9;

    for(int i=1; i<=n; i++)
        d[i]=INF;

    d[1]=0;

    for(int k=1; k<=n; k++)
    {
        int x=-1;

        for(int i=1; i<=n; i++)
            if(!viz[i] && (x==-1 || d[i]<d[x]))
                x=i;

        if(x==-1 || d[x]==INF)
            break;

        viz[x]=1;

        for(auto p:v[x])
        {
            int y=p.first;
            int c=p.second;

            if(d[y]>d[x]+c)
                d[y]=d[x]+c;
        }
    }
}

void afisare()
{
    for(int i=2; i<=n; i++)
    {
        if(d[i]==1000000000)
            fout<<0<<" ";
        else
            fout<<d[i]<<" ";
    }
}

int main()
{
    citire();
    rezolvare();
    afisare();

    return 0;
}