Cod sursa(job #2032504)

Utilizator CezarTDTodirisca Cezar CezarTD Data 5 octombrie 2017 09:44:22
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.61 kb
#include <bits/stdc++.h>

using namespace std;

ifstream f("bfs.in");
ofstream g("bfs.out");
const int N = 100010;
vector<int> v[N];
int n,m,x,y,s,dist[N];
queue<int> q;
int main()
{
    f>>n>>m>>s;
    for(; m; m--)
    {
        f>>x>>y;
        v[x].push_back(y);
    }
    dist[s]=1;
    q.push(s);
    while(q.size())
    {
        x=q.front();
        q.pop();
        for(auto vec:v[x])
            if(!dist[vec])
            {
                dist[vec]=dist[x]+1;
                q.push(vec);
            }

    }
    for(x=1;x<=n;x++)
        g<<dist[x]-1<<' ';
    return 0;
}