reversed-c, 80 bytes

Result

WA

Duration

695ms

Code [DL]

{؛1+()ɹɐɥɔʇǝƃ=X((0:,0,+W/X¿W⅋X)ɹɐɥɔʇnd؛X=W؛)ɹoɟ}(W'X)uıɐɯ

Disassembly

main(X,M){for(;M=X;putchar(X&M?X/M+'0':0))X=getchar()+1;}

stdin

27969876543210570483845071574501234567892752794216359815239386967101368579601473650318973050969815484

stdout

c11010000000001101101010101101011111111101001100010110010110101010011110110011101001011000101010010100

stderr

/tmp/code.c:1:1: warning: return type defaults to 'int' [-Wimplicit-int]
 main(X,M){for(;M=X;putchar(X&M?X/M+'0':0))X=getchar()+1;}
 ^~~~
/tmp/code.c: In function 'main':
/tmp/code.c:1:1: warning: type of 'X' defaults to 'int' [-Wimplicit-int]
/tmp/code.c:1:1: warning: type of 'M' defaults to 'int' [-Wimplicit-int]
/tmp/code.c:1:1: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
/tmp/code.c:1:20: warning: implicit declaration of function 'putchar' [-Wimplicit-function-declaration]
 main(X,M){for(;M=X;putchar(X&M?X/M+'0':0))X=getchar()+1;}
                    ^~~~~~~
/tmp/code.c:1:45: warning: implicit declaration of function 'getchar' [-Wimplicit-function-declaration]
 main(X,M){for(;M=X;putchar(X&M?X/M+'0':0))X=getchar()+1;}
                                             ^~~~~~~

strace