Cod sursa(job #988430)

Utilizator Eugen_VlasieFMI Vlasie Eugen Eugen_Vlasie Data 22 august 2013 21:07:27
Problema Algoritmul lui Dijkstra Scor 20
Compilator cpp Status done
Runda Arhiva educationala Marime 1.14 kb
#include <fstream>
#include <stack>
#include <queue>
#include <vector>
#include <iterator>
using namespace std;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> ii;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
priority_queue< ii,vector<ii>,greater<ii> > Q;
int n,m,i,a,b,d[50001];
int G[501][501];
int main()
{
    f>>n>>m;
    for(i=1;i<=m;i++)
    {
        f>>a>>b;
        f>>G[a][b];
    }
    for(i=1;i<=n;i++)
        d[i]=1005;
    Q.push(ii(0,1));
    d[1]=0;
    while(!Q.empty())
    {
        ii per=Q.top();
        Q.pop();
        int nod=per.second,dist=per.first;
        if(dist<=d[nod])
        {
            for(int it=1;it<=n;it++)
            {
                int nod2=it;
                int dist2=G[nod][it];
                if(d[nod2]>d[nod]+dist2&&dist2)
                {
                    d[nod2]=d[nod]+dist2;
                    Q.push(ii(d[nod2],nod2));
                }
            }
        }
    }
    for(i=2;i<=n;i++)
    {
        if(d[i]!=1005)
            g<<d[i]<<" ";
        else
            g<<"0 ";
    }
    g<<'\n';
    return 0;
}