#include <stdio.h> unsigned char flip(unsigned char n) { return n | (!n); } int main(void) { for (unsigned char i = 0 ; i != 10 ; i++) { } return 0; }
Standard input is empty
0 becomes 1 1 becomes 1 2 becomes 2 3 becomes 3 4 becomes 4 5 becomes 5 6 becomes 6 7 becomes 7 8 becomes 8 9 becomes 9