php, 59 bytes

Result

ERROR

Code [DL]

<?php for(;;)echo +!fmod(sqrt(8*bindec(fgets(STDIN))+1),1);

stdin

11111110
01101011
00110101
00000001
01001110
00001111
01001011
00000000
10000101
01111011
01111000
00000110
10101000
01011000
00110111
00101101
01000110
10110011
10110101
00100100
10000110
01010000
01101001
10110000
00011100
11100111
01011011
11001100
11010010
00100001
00010101
01011101
10101011
00000011
11000010
01011100
00001110
10111110
10001000
01001111
00000001
01000010
11110100
00001000
00001010
11111101
10011001
10101100
01111101
00001111

stdout

stderr

strace