Cod sursa(job #3305331)

Utilizator mihail_11Ionescu Mihail mihail_11 Data 31 iulie 2025 19:46:29
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.89 kb
#include <bits/stdc++.h>

using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
const int MAXN=100005;
int n,m;
int dist[MAXN],frecv[MAXN];
vector<int> graf[MAXN];
void bfs(int nod)
{
    queue<int> bf;
    bf.push(nod);
    frecv[nod]=1;
    dist[nod]=0;
    while(!bf.empty())
    {
        int nnod=bf.front();
        bf.pop();
        for(auto u:graf[nnod])
        {
            if(frecv[u]==0)
            {
                bf.push(u);
                dist[u]=dist[nnod]+1;
                frecv[u]=1;
            }
        }
    }
}
int main()
{
    int ans=0,nod1,nod2,src;
    fin>>n>>m>>src;
    for(int i=1;i<=m;++i)
    {
        fin>>nod1>>nod2;
        graf[nod1].push_back(nod2);
    }
    for(int i=1;i<=n;++i)
        dist[i]=-1;
    bfs(src);
    for(int i=1;i<=n;++i)
    {
        fout<<dist[i]<<' ';
    }
    return 0;
}