using System;
public class Program
{
public static void Main()
int test = binaryToDecimal("01000101");
Console.WriteLine(test);
}
static int binaryToDecimal(string input) {
int result = 0;
for (int i = input.Length; i > 0 ; i--)
if (input.Substring(i-1,1) == "1")
result += (int)Math.Pow(2,(input.Length-i));
return result;