#include <stdio.h>

int main(void)
{
   int min = 10, max = 20, midpoint;

   /* midpoint = min+(max-min)/2; */
   midpoint = min + (max - min) >> 1;

   printf("The middle of interval \
           [%d, %d] is %d\n",     \
           min, max, midpoint);

   return 0;
}