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OI-codes/Luogu/P1551/P1551.cpp

31 lines
563 B
C++

#include <bits/stdc++.h>
using namespace std;
int n, m, p, x, y, j, f[5005];
int find(int x) {
if (f[x] == x) return f[x];
return f[x] = find(f[x]);
}
int main() {
cin >> n >> m >> p;
for (int i = 1; i <= n; i++) {
f[i] = i;
}
for (int i = 1; i <= m; i++) {
cin >> x >> y;
f[find(x)] = find(y);
}
for (int i = 1; i <= p; i++) {
cin >> x >> y;
if (find(x) == find(y)) {
cout << "Yes" << endl;
} else {
cout << "No" << endl;
}
}
return 0;
}