Pagini recente » Cod sursa (job #945240) | Cod sursa (job #2530000) | Cod sursa (job #2907191) | Cod sursa (job #2349451) | Cod sursa (job #2692722)
#include <iostream>
#include<fstream>
#include<vector>
#include<queue>
using namespace std;
vector<int>v[1000001];
deque<pair<int, int> >coada;
int t[100001];
bool ver[100001];
int main() {
int n, m, s, i, x, y, nod, newn;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
fin>>n>>m>>s;
for(i=1;i<=m;i++) {
fin>>x>>y;
v[x].push_back(y);
}
coada.push_back(make_pair(s, 0));
for(i=1;i<=n;i++) {
t[i]=-1;
}
t[s]=0;
while(!coada.empty()) {
nod=coada.front().first;
coada.pop_front();
ver[nod]=1;
for(i=0;i<v[nod].size();i++) {
newn=v[nod][i];
if(ver[newn]==0) {
ver[newn]=1;
t[newn]=t[nod]+1;
coada.push_back(make_pair(newn, t[newn]));
}
}
}
for(i=1;i<=n;i++) {
fout<<t[i]<<" ";
}
return 0;
}