#include <bits/stdc++.h>
using namespace std;
using i64 = int64_t;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n, q;
    cin >> n >> q;
    vector<int> p(n + 1), g(n + 1), c(n + 1);
    for (int i = 1; i <= n; i += 1) {
        cin >> p[i];
        if (p[i] != -1) {
            g[p[i]] = i;
        }
    }
    for (int i = 1; i <= n; i += 1) {
        if (p[i] == -1) {
            for (int j = i; j; j = g[j]) {
                c[j] = i;
            }
        }
    }
    for (int i = 0, a, b; i < q; i += 1) {
        cin >> a >> b;
        cout << (c[a] == c[b] ? "Yes\n" : "No\n");
    }
}