Pagini recente » Cod sursa (job #2571534) | Borderou de evaluare (job #898049) | Cod sursa (job #1156458) | Cod sursa (job #507738) | Cod sursa (job #600836)
Cod sursa(job #600836)
#include <stdio.h>
#include <vector>
#include <queue>
#define N 100001
using namespace std;
vector <int> Nod[N];
int n, m, s, cost[N];
void BFS()
{
int i, nodc;
queue <int> Q;
memset(cost, -1, sizeof(cost));
Q.push(s);
cost[s] = 0;
while(!Q.empty())
{
nodc = Q.front();
Q.pop();
for(i = 0; i < Nod[nodc].size(); i++)
if(cost[Nod[nodc][i]] < 0)
{
cost[Nod[nodc][i]] = cost[nodc] + 1;
Q.push(Nod[nodc][i]);
}
}
}
int main()
{
freopen("bfs.in", "r", stdin);
freopen("bfs.out", "w", stdout);
scanf("%d %d %d", &n, &m, &s);
int x, y, i;
for(i = 0; i < m; i++)
{
scanf("%d %d", &x, &y);
Nod[x].push_back(y);
}
BFS();
for(i = 1; i <= n; i++)
printf("%d ", cost[i]);
printf("\n");
return 0;
}