Pagini recente » Cod sursa (job #97434) | Cod sursa (job #1257753) | Cod sursa (job #1898797) | Cod sursa (job #427965) | Cod sursa (job #3263178)
#include <iostream>
#include <fstream>
#include <queue>
#include <vector>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
long long n, m, s, viz[10002];
vector<vector<bool>> a;
void citire()
{
fin>>n>>m>>s;
a.resize(n);
for(int i=0; i<=n; i++)
a[i].resize(n);
for(int i=1; i<=m; i++){
int x, y;
fin>>x>>y;
a[x][y]=1;
}
for(int i=1; i<=n; i++)
viz[i] = -1;
}
void parc(int k)
{
int x;
queue<int> Q;
Q.push(k);
viz[k]=0;
while(!Q.empty()){
x = Q.front();
Q.pop();
for(int i=1; i<=n; i++)
if(a[x][i]==1 && viz[i]==-1){
Q.push(i);
a[x][i]=0;
viz[i] = viz[x]+1;
}
}
for(int i=1; i<=n; i++)
fout<<viz[i]<<" ";
}
int main()
{
citire();
parc(s);
}