<doocs>0367.Valid Perfect Square_1.py
def isPerfectSquare( num: int) -> bool:
    left, right = 1, num
    while left < right:
        mid = (left + right) >> 1
        if mid * mid >= num:
            right = mid
        else:
            left = mid + 1
    return left * left == num
def sample_funcname ( var_0 : int ) -> bool :
    var_4 , var_5 = 1 , var_0
    while var_4 < var_5 :
        var_6 = ( var_4 + var_5 ) >> 1
        if var_6 * var_6 >= var_0 :
            var_5 = var_6
        else :
            var_4 = var_6 + 1
    return var_4 * var_4 == var_0
