reversed-c, 85 bytes

Result

WA

Duration

683ms

Code [DL]

{؛((d>b)+8ᔭ)ɹɐɥɔʇnd⅋⅋b(d=b؛91⅋()ɹɐɥɔʇǝƃ=d؛)ɹoɟ}(d)uıɐɯ؛b

Disassembly

q;main(p){for(;p=getchar()&16;q=p)q&&putchar(48+(q<p));}

stdin

39507537987654321059523597845278472650897035374810253494608404591536438179109601234567897514061695202

stdout

0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

stderr

/tmp/code.c:1:1: warning: data definition has no type or storage class
 q;main(p){for(;p=getchar()&16;q=p)q&&putchar(48+(q<p));}
 ^
/tmp/code.c:1:1: warning: type defaults to 'int' in declaration of 'q' [-Wimplicit-int]
/tmp/code.c:1:3: warning: return type defaults to 'int' [-Wimplicit-int]
 q;main(p){for(;p=getchar()&16;q=p)q&&putchar(48+(q<p));}
   ^~~~
/tmp/code.c: In function 'main':
/tmp/code.c:1:3: warning: type of 'p' defaults to 'int' [-Wimplicit-int]
/tmp/code.c:1:18: warning: implicit declaration of function 'getchar' [-Wimplicit-function-declaration]
 q;main(p){for(;p=getchar()&16;q=p)q&&putchar(48+(q<p));}
                  ^~~~~~~
/tmp/code.c:1:1: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
 q;main(p){for(;p=getchar()&16;q=p)q&&putchar(48+(q<p));}
 ^
/tmp/code.c:1:38: warning: implicit declaration of function 'putchar' [-Wimplicit-function-declaration]
 q;main(p){for(;p=getchar()&16;q=p)q&&putchar(48+(q<p));}
                                      ^~~~~~~
/tmp/code.c:1:36: warning: value computed is not used [-Wunused-value]
 q;main(p){for(;p=getchar()&16;q=p)q&&putchar(48+(q<p));}
                                    ^~

strace