public int ArrangeCoins(int n) {        if(n == 0){            return 0;        }        if(n == 1){            return 1;        }                        var half = n/2 + 1;                var sum = 0;		var count = 0;        for(var i = 1;sum >= 0 && i <= half && sum < n; i++){            sum += i;			count ++;        }        if(sum > n || sum < 0){			count --;		}		//Console.WriteLine(sum);        return count;    }