#include <stdio.h>
int main(void) {
int a, b, ghai, thia, ghul, thul;
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;
}
return 0;
}
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