Cod sursa(job #2999070)

Utilizator bogdann31Nicolaev Bogdan bogdann31 Data 10 martie 2023 14:20:38
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.42 kb
#include <bits/stdc++.h>
using namespace std;
#define mod                1000000007
#define ll                 long long 
#define all(v)             v.begin(), v.end()
#define fr(n)              for(ll i=0;i<n;++i)
#define ctz(x)             __builtin_ctzll(x)
#define clz(x)             __builtin_clzll(x)
#define pcount(x)          __builtin_popcountll(x)
const int dx[] = {-1, 0, 1, 0};
const int dy[] = {0, 1, 0, -1};
#define cin fin
#define cout fout
ifstream fin("bfs.in");
ofstream fout("bfs.out");
//const ll maxn = 3e5 + 5;
//int f[maxn],nf[maxn],inv[maxn];
//const int M=998244353;
//void init(){
//inv[1]=1; for (int i=2;i<maxn;i++) inv[i]=M-1ll*(M/i)*inv[M%i]%M;
//f[0]=nf[0]=1; for (int i=1;i<maxn;i++) f[i]=1ll*f[i-1]*i%M,nf[i]=1ll*nf[i-1]*inv[i]%M;
//}
//int C(int x,int y){return 1ll*f[x]*nf[y]%M*nf[x-y]%M;}



void solve(){
    ll n, m, s;cin>>n>>m>>s;
    vector< vector<ll> > v(n+1);
    fr(m){
        ll a,b;cin>>a>>b;
        v[a].push_back(b);
    }
    queue<ll> q;q.push(s);
    vector<ll> f(n+1, -1);f[s]++;
    // vector<ll> f(n+1, 0);
    while(!q.empty()){
        ll u=q.front();q.pop();
        for(auto x:v[u]){
            if(f[x]==-1){
                f[x]=f[u]+1;
                q.push(x);
            }
        }
    }
    for(ll i=1; i<=n; i++){
        cout<<f[i]<<" ";
    }

    
}


int main(){
//    ios_base::sync_with_stdio(false); cin.tie(NULL);
//    ll t;cin>>t;while(t--){solve();cout<<endl;}
    solve();
}