Cod sursa(job #2384961)

Utilizator RaulG99Gioanca Raul RaulG99 Data 21 martie 2019 12:55:22
Problema Algoritmul lui Dijkstra Scor 20
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.43 kb
#include <iostream>
#include <vector>
#include <queue>
#include <fstream>

using namespace std;

#define INF 100100
#define NMAX 50100

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

int viz[NMAX];
int n,m;
int Dist[NMAX];
vector <pair <int,int> > graf[NMAX];



void citireGraf(int m)
{
    int i,x,y,c;
    for(i = 1; i <= m; i++)
    {
        f>>x>>y>>c;
        graf[x].push_back(make_pair(y,c));
    }
}

void ini(int x)
{
    int i;
    for(i = 1; i <= n; i++)
        Dist[i] = INF;
    Dist[x]=0;
}

int main()
{
    int top,lim,i;
    f>>n>>m;
    citireGraf(m);
    ini(1);

    queue <int> C;
    C.push(1);
    viz[1] = 1;

    while(C.empty()==false)
    {
        top = C.front();
        C.pop();
        lim = graf[top].size();
            for(i = 0; i < lim; i++)
            {
                int vecin = graf[top][i].first;
                int cost = graf[top][i].second;

                if(Dist[top] + cost < Dist[vecin])
                {
                    Dist[vecin] = Dist[top] +cost;
                    if(viz[vecin] == 0)
                    {
                        C.push(vecin);
                        viz[vecin] = 1;
                    }
                }
            }
    }

    for(i=2;i<=n;i++)
        {
            if(Dist[i] == INF)
                g<<0<<" ";
            else
            g<<Dist[i]<<" ";
        }

    return 0;
}