Cod sursa(job #1438655)

Utilizator sanzianaioneteIonete Sanziana sanzianaionete Data 20 mai 2015 15:44:22
Problema Algoritmul lui Dijkstra Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.95 kb
#include<fstream>
#include<vector>
#include<queue>
#define INF 50000007
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
int d[50004],n,m;
vector<int> a[50004];
queue<int> c;
int main()
{
    f>>n>>m;
    for(int i=2;i<=n;i++)
        d[i]=INF;
    for(int i=0;i<m;i++)
    {
        int x,y,cost;
        f>>x>>y>>cost;
        a[x].push_back(y*1001+cost);
    }
    c.push(1);
    while(!c.empty())
    {
        int l=a[c.front()].size();
        for(int i=0;i<l;i++)
        {
            if(d[c.front()]+a[c.front()][i]%1001<d[a[c.front()][i]/1001])
            {
                c.push(a[c.front()][i]/1001);
                d[a[c.front()][i]/1001]=d[c.front()]+a[c.front()][i]%1001;
            }
        }
        c.pop();
    }
    for(int i=2;i<=n;i++)
    {
        if(d[i]==INF)
            g<<"0 ";
        else
            g<<d[i]<<' ';
    }
    f.close();g.close();
    return 0;
}