unreadable, 459 bytes

Result

AC

Code [DL]

'""""'"""""'""'""""""'"""'""""""""""'""""""'"""""""'"""'""'"""""""'"""""""'"""'""""'""""'""""""'"""'""'""'""'""'""'""'""'""'""'""'"""'""""""'""'"""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'""'"""'"""""'""""'""""""'""'""'"""'"""""""'""""""'""'"""'""'"""""""'""'"""'""""""'"""'""""""""'"""""""'"""'"""""'""'""""""'""'""'"""'""""""""'"""""""'""'""'"""'"'"""""""'""'"""

Disassembly

(do (while (inc (set (1), (in))), (set (get (1)), (inc (get (get (1)))))), (do (do (set (1), (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (1)))))))))))), (set (inc (1)), (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (inc (1))))))))))))))))))))))))))))))))))))))))))))))))), (while (do (set (inc (inc (1))), (get (set (inc (1)), (inc (get (inc (1))))))), (set (1), (dec (get (1))))), (while (inc (set (inc (inc (1))), (dec (get (inc (inc (1))))))), (print (get (inc (1))))))))

stdin

6131723297112830680805982095363252499041663184446672719233254361984152993444963050874276279512464842

stdout

0000000111111111122222222222222333333333334444444444444455555556666666666677777778888888899999999999

stderr

strace