#include<atcoder/all>
using namespace std;

int main() {
	int N, Q;
	cin >> N >> Q;
	atcoder::dsu uf(N);
	for(int i = 0; i < N; i++) {
		int u;
		cin >> u;
		if(u == -1) continue;
		else {
			uf.merge(i, u-1);
		}
	}
	
	while(Q--) {
		int u, v;
		cin >> u >> v;
		u--;
		v--;
		cout << (uf.same(u, v) ? "Yes" : "No") << endl;
	}
}