#include <stdio.h>
int main () {
int I, F;
do {
} while (I >= F);
for (; I
< F
; I
++, F
--) printf("%d %d ", I
, F
); printf("\nfim de programa\n"); }
//https://pt.stackoverflow.com/q/204611/101
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWFpbiAoKSB7CglpbnQgSSwgRjsKCWRvIHsKCQlzY2FuZigiJWQiLCAmSSk7CgkJc2NhbmYoIiVkIiwgJkYpOwoJfSB3aGlsZSAoSSA+PSBGKTsKCWZvciAoOyBJIDwgRjsgSSsrLCBGLS0pIHByaW50ZigiJWQgJWQgIiwgSSwgRik7CglpZiAoSSA9PSBGKSBwcmludGYoIiVkICIsIEkpOwoJcHJpbnRmKCJcbmZpbSBkZSBwcm9ncmFtYVxuIik7Cn0KCi8vaHR0cHM6Ly9wdC5zdGFja292ZXJmbG93LmNvbS9xLzIwNDYxMS8xMDE=