#include <stdio.h>
int main ()
{
    int a = 10;
    a +=5;
    printf("%d\n",a);

    a -=2;
    printf("%d\n",a);

    a  *=3;
    printf("%d\n",a);

    a /=2;
    printf("%d\n",a);

    return 0;
    
    
}