#include <bits/stdc++.h>
using namespace std;
long long exp(long long x, long long y, long long p) {
  long long res = 1;
  while (y) {
    if (y % 2) res = (res * x % p) % p;
    x = (x * x) % p;
    y /= 2;
  }
  return res;
}
long long expm(long long x, long long y) {
  long long res = 1;
  while (y) {
    if (y % 2) res = (res * x % ((long long)1e9 + 7)) % ((long long)1e9 + 7);
    x = (x * x) % ((long long)1e9 + 7);
    y /= 2;
  }
  return res;
}
signed main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  long long t;
  cin >> t;
  while (t--) {
    long long n, k;
    cin >> n >> k;
    if ((n & 1) == (k & 1) && n >= k * k)
      cout << "YES"
           << "\n";
    else {
      cout << "NO"
           << "\n";
    }
  }
  return 0;
}
