reversed-c, 98 bytes

Result

AC

Duration

697ms

Code [DL]

{؛(8ᔭ+x/ʎ)ɹɐɥɔʇnd(ʎ=x؛01-(()ɹɐɥɔʇǝƃ=ʎ)؛()ɹɐɥɔʇǝƃ=x)ɹoɟ}(ʎ)uıɐɯ؛x

Disassembly

x;main(y){for(x=getchar();(y=getchar())-10;x=y)putchar(y/x+48);}

stdin

23219876543210314292323651304056029751543012345678959748608942045242582172430673182092106493957806819

stdout

1001000000000101010101100101011011000100011111111101001001100011010110010100110010010001010101101101

stderr

/tmp/code.c:1:1: warning: data definition has no type or storage class
 x;main(y){for(x=getchar();(y=getchar())-10;x=y)putchar(y/x+48);}
 ^
/tmp/code.c:1:1: warning: type defaults to 'int' in declaration of 'x' [-Wimplicit-int]
/tmp/code.c:1:3: warning: return type defaults to 'int' [-Wimplicit-int]
 x;main(y){for(x=getchar();(y=getchar())-10;x=y)putchar(y/x+48);}
   ^~~~
/tmp/code.c: In function 'main':
/tmp/code.c:1:3: warning: type of 'y' defaults to 'int' [-Wimplicit-int]
/tmp/code.c:1:17: warning: implicit declaration of function 'getchar' [-Wimplicit-function-declaration]
 x;main(y){for(x=getchar();(y=getchar())-10;x=y)putchar(y/x+48);}
                 ^~~~~~~
/tmp/code.c:1:48: warning: implicit declaration of function 'putchar' [-Wimplicit-function-declaration]
 x;main(y){for(x=getchar();(y=getchar())-10;x=y)putchar(y/x+48);}
                                                ^~~~~~~

strace