#include<bits/stdc++.h>
#include <atcoder/all>
#ifdef LOCAL
#include <debug_print.hpp>
#define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#define debug(...) (static_cast<void>(0))
#endif
using namespace atcoder;
using mint=modint998244353;
using namespace std;
using ll=long long;
using ul=unsigned long long;
int dx[8] = {-1, 1, 0, 0, -1, -1, 1, 1};
int dy[8] = {0, 0, -1, 1, -1, 1, -1, 1};
using Graph=vector<vector<int>>;
ll op(ll a,ll b){return min(a,b);}
ll e(){return 2e9;}
int main(){
    int N,Q;
    cin>>N>>Q;
    dsu uf(N);
    for(int i=0;i<N;i++){
        int a;
        cin>>a;
        if(a!=-1)uf.merge(a-1,i);
    }
    while(Q--){
        int a,b;
        cin>>a>>b;
        a--,b--;
        cout<<(uf.same(a,b)?"Yes":"No")<<endl;
    }
}