#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;

struct node {
    int start;
    int end;
    bool is;

    bool operator<(const node& other) const{
        
        if(start == other.start){
            return end < other.end;
        }
        return start < other.start;
    }

    bool operator==(const node& other)const {
        return (start == other.start) && (end == other.end);
    }
};



void solve() {
    int q, n;
    cin >> n >> q;
    vector<int> arr(n + 3, 0);

    for(int i = 1; i <= n; ++i){
        cin >> arr[i];
    }

    vector<vector<bool>> dp(n + 3, vector(n + 3, false));

    for (int s = 1; s <= n; ++s) {
        dp[s][s] = true;
        for (int e = s + 1; e <= n; ++e) {
            dp[s][e] = dp[s][e-1] && (arr[e] >= arr[e-1]); 
        }
    }

    int s,e;
    for (int k = 0; k < q; ++k) {
        cin >> s >> e;
        if (dp[s][e]) {
            cout << "YES\n";
        } else{
            cout << "NO\n";
        }
    }
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);

    solve();

    return 0;
}