#include <bits/stdc++.h>
using namespace std;
const long long int MAX = 1000000007;
const long long int MAXN = 100010;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long int t;
  cin >> t;
  while (t--) {
    long long int n, k;
    cin >> n >> k;
    if (n % 2 == 0 && k % 2 == 1)
      cout << "NO" << endl;
    else if (n % 2 == 1 && k % 2 == 0)
      cout << "NO" << endl;
    else {
      if (k * k <= n)
        cout << "YES" << endl;
      else
        cout << "NO" << endl;
    }
  }
  return 0;
}
