by@progrunner17
WA
while a=gets;p sqrt(1+8*a.to_i 2)%1>0?0:1;end
10100000 11000001 01111110 00001111 11010111 00011111 00111000 01011101 00010101 11011110 00011110 00111110 01011011 00011100 01000010 01111000 00000001 11111101 11001110 11101001 11010010 01010010 01001011 00001010 01001010 00101101 01001110 00001100 00000110 11100011 10101011 01001000 01101001 10111110 00110111 11100111 00000000 01010111 11101000 01000110 01110000 01110101 01000000 00000011 00000011 00100100 10001000 10011001 00010101 10001010
Error in /volume/CODE:1: [1mundefined method 'sqrt'[0m
while a=gets;p sqrt(1+8*a.to_i 2)%1>0?0:1;end
[32;1m^~~~[0m