#include <stdio.h>
#include <stdlib.h>

int main()
{ int a;
    printf("a= "); scanf("%d", &a);
   short int bit2 = 0, bit4 = 0;
   if(a & (1 << 1))bit2 = 1;
   if(a & (1 << 3))bit4 = 1;

   if (bit2 != bit4){
    if(bit2) a = a & (255 -(1 << 1));
    else a = a | (1 << 1);
    if(bit4) a = a & (255 -(1 << 3));
    else a = a |(1 << 3);
   }
   printf("%i",a);
   system("pause")

    return 0;
}