export function isPerfectSquare(n: number): boolean {
  if (n === 0 || n === 1) return true;

  for (var i = 2; i <= n; i++) {
    var result = i * i;
    if (result === n) {
      return true;
    }
    else if (result > n) {
      break;
    }
  }
  return false
}