Pagini recente » Cod sursa (job #512870) | Cod sursa (job #1568440) | Cod sursa (job #2446305) | Cod sursa (job #1035421) | Cod sursa (job #2031336)
//#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <queue>
#include <algorithm>
#include <vector>
#define FOR(i,x,n) \
for(int i = x;i <= n;i++)
using namespace std;
ifstream f("bfs.in");
ofstream g("bfs.out");
int n, m, s, noduri[100010];
vector <int> v[100010];
void read() {
f >> n >> m >> s;
FOR(i, 1, m) {
int x, y;
f >> x >> y;
v[x].push_back(y);
}
FOR(i, 1, n)noduri[i] = -1;
}
void solve(int s) {
queue<int> que;
que.push(s);
noduri[s] = 0;
while (!que.empty()) {
int r = que.front();
que.pop();
FOR(i, 0, v[r].size()-1)
if (noduri[v[r][i]] == -1) {
que.push(v[r][i]);
noduri[v[r][i]] = noduri[r] + 1;
}
}
FOR(i, 1, n)g << noduri[i] << ' ';
}
int main()
{
f >> n >> m >> s;
FOR(i, 1, m) {
int x, y;
f >> x >> y;
v[x].push_back(y);
}
FOR(i, 1, n)noduri[i] = -1;
solve(s);
/*FOR(i, 1, n) {
cout << i << " = ";
FOR(j, 0, v[i].size() - 1)cout << v[i][j];
cout << endl;
}*/
//cout << endl;
//system("pause");
return 0;
}