#include <stdio.h>
int main(void) {
int a, b, ghai, thia, ghul, thul, c , d;
b=a;
thul=0;
ghul=0;
for(ghai=4; ghai<b ;b=b-4){
ghul=ghul+1;
}
for(thia=2; b>0; b=b-2){
thul=thul+1;
}
c=thul+ghul;
for(d=0; a>0; a=a-thia){
d=d+1;
}
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWFpbih2b2lkKSB7CglpbnQgYSwgYiwgZ2hhaSwgdGhpYSwgZ2h1bCwgdGh1bCwgYyAsIGQ7CglzY2FuZigiJWQiLCAmYSk7CgliPWE7Cgl0aHVsPTA7IAoJZ2h1bD0wOwoJZm9yKGdoYWk9NDsgZ2hhaTxiIDtiPWItNCl7CgkJZ2h1bD1naHVsKzE7Cgl9Cglmb3IodGhpYT0yOyBiPjA7IGI9Yi0yKXsKCQl0aHVsPXRodWwrMTsKCX0KCWM9dGh1bCtnaHVsOwoJZm9yKGQ9MDsgYT4wOyBhPWEtdGhpYSl7CgkJZD1kKzE7Cgl9CglwcmludGYoIiVkXG4lZCIsIGMsIGQpOwoJcmV0dXJuIDA7Cn0K