by@cookies146
WA
50.times{a=(((8*gets.to_i+1)**(0.5)-1)/2);p(a.to_i==a ?1:0)}10100101 10000110 01110011 01111000 01011011 00110001 10011001 10010111 00100100 10101011 10011000 00101101 01000110 01001111 00000001 11010010 01101001 11100100 10101101 00010101 01101100 10011111 11001010 00010010 01000101 10000010 01001110 00011100 01011010 01000010 00101000 01001100 00101101 00110111 00001111 11110101 00001010 00100010 10101011 11100111 01001101 00000011 10001000 00000000 10001111 11111101 00000110 10111110 00110110 11110111
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