Cod sursa(job #1880455)

Utilizator BAC_AndreiBejinariu Andrei Catalin BAC_Andrei Data 15 februarie 2017 19:26:17
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.55 kb
#include <bits/stdc++.h>
using namespace std;
ifstream f("bfs.in");
ofstream g("bfs.out");
const int N = 100010;
vector<int> v[N];
queue<int> q;
int n,m,s,i,j,d[N];
int main()
{
    f>>n>>m>>s;

    for(;m;m--)
    {
        f>>i>>j;
        v[i].push_back(j);
    }
    d[s]=1;q.push(s);
    for(;q.size();q.pop())
    {
        i=q.front();
        for(auto it:v[i])
            if(!d[it])
        {
            d[it]=d[i]+1;
            q.push(it);
        }
    }
    for(i=1;i<=n;i++)
        g<<d[i]-1<<' ';
    return 0;
}