public void IsPerfectSquareTest()
{
var s = new Solution();
Assert.True(s.IsPerfectSquare(1));
Assert.False(s.IsPerfectSquare(7));
Assert.True(s.IsPerfectSquare(9));
Assert.True(s.IsPerfectSquare(16));
Assert.False(s.IsPerfectSquare(2147483647));
// Test case 37/70 - https://leetcode.com/submissions/detail/341343931/
Assert.True(s.IsPerfectSquare(808201));
}