#include <stdio.h>
int toggleFifthBit(int n) {
// Write your code here
int b = 32;
int nb = ~b;
int temp_n = 0;
temp_n = nb & n;
if(temp_n == n) //set
{
n |= b;
}
else //clear
{
n &= nb;
}
return n;
}
int main() {
int n;
scanf("%d", &n);
printf("%d", toggleFifthBit(n));
return 0;
}