#include <stdio.h>
int toggleFifthBit(int n) {
// Write your code here
int bit_check = (n>>5) & 0x01;
if(bit_check)
{
n &= ~(1<<5);
}
else
{
n |= (1<<5);
}
return n ;
}
int main() {
int n;
scanf("%d", &n);
printf("%d", toggleFifthBit(n));
return 0;
}