Cod sursa(job #2544234)

Utilizator AndreiDeltaBalanici Andrei Daniel AndreiDelta Data 11 februarie 2020 21:00:43
Problema Algoritmul lui Dijkstra Scor 50
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.98 kb
#include <bits/stdc++.h>
#define Dim 50001
#define oo 1e9+1
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
int N,M,a,b,c,D[Dim],T[Dim];
bool viz[Dim];

typedef pair<int,int> pi;

vector < pi > V[Dim];

int main()
{
    f>>N>>M;
    for(int i=1;i<=M;i++)
    {
        f>>a>>b>>c;
        V[a].push_back({b,c});
    }
    for(int i=1;i<=N;i++) D[i]=oo;

    D[1]=0;
    T[1]=0;
    for(int i=1;i<=N;i++)
    {
        int minim=oo,nod;
        for(int j=1;j<=N;j++)
        if( D[j] < minim && viz[ j ] == 0  )
        {
            minim=D[j];
            nod=j;
        }

        viz[nod]=1;
        for(unsigned int i=0;i<V[nod].size();i++)
        {
            int vecin=V[nod][i].first;
            int cost=V[nod][i].second;

            if( D[nod] + cost < D[vecin] )
            D[vecin]=D[nod]+cost;
        }

    }
    for(int i=2;i<=N;i++)
    if( D[i] == oo ) g<<0<<' ';
    else g<<D[i]<<' ';


    return 0;
}