Cod sursa(job #1336846)

Utilizator NacuCristianCristian Nacu NacuCristian Data 8 februarie 2015 12:23:55
Problema Algoritmul lui Dijkstra Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 1.01 kb
#include <iostream>
#include <cstdio>
#include <queue>
#include <vector>
#define inf 10000000000000;

using namespace std;

int m,n,d[50000];

struct vecin
{
    int x,c;
};

vector <vecin> a[250010];
queue <int> q;

void citire()
{
    freopen("dijkstra.in","r",stdin);
    scanf("%d %d",&n,&m);
    for(int i=0;i<m;i++)
    {
        int k;
        vecin aux;
        scanf("%d %d %d",&k,&aux.x,&aux.c);
        a[k].push_back(aux);
    }

    for(int i=2;i<50000;i++)
        d[i]=inf;


}

void Dijkstra()
{
    q.push(1);
    while(!q.empty())
    {
        int k = q.front();
        q.pop();
        for(int i=0;i<a[k].size();i++)
        {
            if(d[k]+a[k][i].c<d[a[k][i].x])
            {
                q.push(a[k][i].x);
                d[a[k][i].x]=d[k]+a[k][i].c;
            }
        }
    }
}

int main()
{
    citire();
    Dijkstra();
    freopen("dijkstra.out","w",stdout);
    for(int i=2;i<=n;i++)
        printf("%d ",d[i]);

    return 0;
}