Cod sursa(job #3303199)

Utilizator CheeseEaterHackRoman Alex CheeseEaterHack Data 14 iulie 2025 18:05:41
Problema Algoritmul lui Dijkstra Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.29 kb
#include <bits/stdc++.h>
#define INFINIT 1000000000
using namespace std;

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

int n , a[105][105], v[105], d[105], t[105];

int main()
{
    int c, p, i, j, m;
    fin>>n>>m;
    p=1;
    for(i=1 ; i<=n ; ++i)
    {
        for(j=1; j<=n; ++j)
        {
            a[i][j]=INFINIT;
        }
    }
    while (fin>>i>>j>>c)
    {
        a[i][j]=c;
    }
    for (i=1; i<=n; i++)
    {
        v[i]=0;
        d[i]=a[p][i];
        t[i]=p;
    }
    v[p]=1, t[p]=0, d[p]=0;
    d[0]=INFINIT;
    for (int k=1 ; k<n; k++)
    {
        int pmax=0;
        for (i=1; i<=n; i++)
        {
            if (v[i]==0 && d[i]<d[pmax])
            {
                pmax=i;
            }
        }
        if (pmax>-1)
        {
            v[pmax]=1;
            for (i=1; i<=n; ++i)
            {
                if (v[i]==0 && d[i]>d[pmax]+a[pmax][i])
                {
                    d[i]=d[pmax]+a[pmax][i]; 
                    t[i] = pmax;
                }
            }
        }
    }
    for (i=1; i<=n; ++i)
    {
        if (d[i]!=INFINIT)
        {
            fout<<d[i]<<" ";
        }
        else
        {
            fout<<-1<<" ";
        }
    }

    

    return 0;

}