Just Solve It

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n, k;
	cin >> n >> k;
	bool f;
	if (k == 1) {
		f = n == 1;
	} else if (k > 2 || n % 2 == 0) {
		f = 1;
	} else f = 0;
	if (f) cout << "YES\n";
	else cout << "NO\n";
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED