Cod sursa(job #2424763)

Utilizator teodor.dumitrescuDumitrescu Teodor teodor.dumitrescu Data 23 mai 2019 20:28:45
Problema Algoritmul lui Dijkstra Scor 50
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.19 kb
#include <iostream>
#include <fstream>
#include <vector>

using namespace std;
vector <pair<int,int> > graf[50005];
int dist[50005];
int viz[50005];
void dijkstra(int N, int S)
{
    int i,j,c,dist_min,index,vecin,lim;
    dist[S]=0;
    for(i=1;i<=N-1;i++)
    {
        dist_min=1000000005;
        for(j=1;j<=N;j++)
        {
            if(dist_min>dist[j] && viz[j]==0)
            {
                dist_min=dist[j];
                index=j;
            }
        }
        viz[index]=1;
        lim=graf[index].size();
        for(j=0;j<lim;j++)
        {
            vecin=graf[index][j].first;
            c=graf[index][j].second;
            if(dist[vecin]>dist[index]+c)
                dist[vecin]=dist[index]+c;
        }
    }
}
int main()
{
    ifstream in("dijkstra.in");
    ofstream out("dijkstra.out");
    int N,M,x,y,c,i;
    in>>N>>M;
    for(i=1;i<=M;i++)
    {
        in>>x>>y>>c;
        graf[x].push_back(make_pair(y,c));
    }
    for(i=1;i<=N;i++)
        dist[i]=1000000005;
    dijkstra(N,1);
    for(i=2;i<=N;i++)
        if(dist[i]==1000000005)
        dist[i]=0;
    for(i=2;i<=N;i++)
        out<<dist[i]<<" ";
    return 0;
}