#include <stdio.h>
int toggleFifthBit(int n) {
// Write your code here
int bit = (0b100000 & n) >> 5;
if(bit){
n = n & (~0b100000);
} else {
n = n | 0b100000;
}
return n;
}
int main() {
int n;
scanf("%d", &n);
printf("%d", toggleFifthBit(n));
return 0;
}