Pagini recente » Cod sursa (job #3348796) | Monitorul de evaluare | Cod sursa (job #3358183) | Cod sursa (job #3326832) | Cod sursa (job #1125569)
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#define nmax 100005
using namespace std;
queue <int> q;
vector <int> v[nmax];
int n, m, a, b, s, dist[nmax];
bool seen[nmax];
void bfs() {
while(!q.empty()) {
int x = q.front();
q.pop();
seen[x] = true;
for(int i=0; i<v[x].size(); i++) {
if(seen[v[x][i]]) continue;
dist[v[x][i]] = dist[x] + 1;
q.push(v[x][i]);
seen[v[x][i]] = true;
}
}
}
int main() {
ifstream f("bfs.in");
ofstream g("bfs.out");
f>>n>>m>>s;
for(int i=1; i<=m; i++) {
f>>a>>b;
v[a].push_back(b);
}
q.push(s);
bfs();
for(int i=1; i<=n; i++) {
if(i != s && dist[i] == 0) g<<"-1 ";
else g<<dist[i]<<" ";
}
g<<"\n";
return 0;
}