by@kurgm
AC
using System;class _{static void Main(){for(int i=0;i++<50;Console.Write(Math.Sqrt(1+8*Convert.ToByte(Console.ReadLine(),2))%1>0?0:1));}}01101001 00100110 11100101 10101010 11000110 11100000 00000001 01000010 10011010 10001110 10100110 00101110 10110011 00000011 10011100 10101011 00000001 00001010 00000000 10001000 00010101 00001111 01011011 01010000 01110110 11001011 00000110 11111001 10001011 10000001 11011100 00000000 00011100 11010010 11100011 01111100 10011001 01111000 00100100 00110111 10110111 11000100 00101101 11111101 10110100 01001110 00011111 11100111 10111110 00010000
10000011000001011111111000100001110011110011010110