Nu aveti permisiuni pentru a descarca fisierul grader_test16.in
Cod sursa(job #3229257)
| Utilizator | Data | 14 mai 2024 20:29:49 | |
|---|---|---|---|
| Problema | BFS - Parcurgere in latime | Scor | 100 |
| Compilator | cpp-64 | Status | done |
| Runda | Arhiva educationala | Marime | 0.93 kb |
#include <iostream>
#include <fstream>
#include <bits/stdc++.h>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
const int Nmax = 1e5 + 5;
vector<vector<int>>v(Nmax);
int ans[Nmax],viz[Nmax];
int n,m,S;
queue<int>Q;
void bfs(){
while(Q.empty() == false){
int x = Q.front();
for(int i = 0; i < v[x].size(); ++ i){
int aux = v[x][i];
if(viz[aux] == 0){
viz[aux] = 1;
ans[aux] = ans[x] + 1;
Q.push(aux);
}
}
Q.pop();
}
}
int main()
{
fin >> n >> m >> S;
while(m){
-- m;
int x,y;
fin >> x >> y;
v[x].push_back(y);
}
ans[S] = 1;
viz[S] = 1;
Q.push(S);
bfs();
for(int i = 1; i <= n; ++ i){
if(ans[i] == 0){
fout << -1 << " ";
}
else{
fout << ans[i] - 1 << " ";
}
}
return 0;
}
