#include <bits/stdc++.h>

using namespace std;

#define LL long long
const int N = 1e6 + 10;

int a[10000];
int main()
{
	int n, q;
	cin >> n >> q;
	for(int i = 1; i <= n; i++)
	{
		cin >> a[i];
	}
	while(q--)
	{
		int l, r, f = 0;
		cin >> l >> r;
		sort(a + l + 1, a + r + 1);
		for(int i = l + 1; i <= r; i++)
		{
			if(a[i] == a[i - 1]) 
			{
				f = 1;
				break;
			}
		}
		if(f == 0) cout << "Yes" << '\n';
		else cout << "No" << '\n';
	}
	return 0;
}