Cod sursa(job #2282616)

Utilizator Anastasia11Susciuc Anastasia Anastasia11 Data 14 noiembrie 2018 10:19:42
Problema Algoritmul lui Dijkstra Scor 20
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.09 kb
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#define Nmax 1005
#define INF (1<<29)

using namespace std;

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

int a[Nmax][Nmax];
int d[Nmax];
bool viz[Nmax];
int n, m, x, y, c, nod;

void dijkstra(int nod)
{
    d[1]=0;
    for (int j = 1; j <= n; j++)
    {
        int min1=INF;
        for (int i = 1; i <= n; i++)
            if(d[i] < min1 && viz[i] == 0)
            {
                min1=d[i];
                nod=i;
            }
        viz[nod]=1;
        for (int i = 1; i <= n; i++)
        {
            if(a[nod][i] == 0) continue;
            if(viz[i] == 1) continue;
            if(d[i] > d[nod]+a[nod][i])
                d[i]=d[nod]+a[nod][i];

        }
    }
}

int main()
{
    f >> n >> m;

    for (int i = 1; i <= m; i++)
    {
        f >> x >> y >> c;
        a[x][y]=c;
    }

    for (int i = 0; i <= n; i++) d[i]=INF;

    dijkstra(1);
    for (int i = 2; i <= n; i++)
        if(d[i]!=INF) g << d[i] << " ";
        else g << "0 ";
    return 0;
}