csharp, 76 bytes

Result

WA

Code [DL]

Console.Write((int)Math.Sqrt(1+8*Convert.ToByte(Console.ReadLine(),2))%1>0))

stdin

11111110
11000100
10000011
00000011
00000000
00001010
01011010
00000001
11100111
00011100
11010000
00001111
11010010
01111000
00011100
01101001
10101011
01000000
01000110
01000011
01101001
00010111
11111101
01111011
00010101
11100110
01001110
00100100
10011001
10110000
01101010
01111110
00101101
00110111
00110010
00100111
00101001
01101000
01001101
11001100
01001111
01000010
10001000
01011011
01010100
10100101
01101110
00000110
11111001
10111110

stdout

Compilation failed: 1 error(s), 0 warnings

stderr

/tmp/code.cs(1,0): error CS1525: Unexpected symbol `Console'
Cannot open assembly '/tmp/code.exe': No such file or directory.
rm: cannot remove '/tmp/code.exe': No such file or directory

strace