#include <stdio.h>
#include <stdint.h>
int toggleFifthBit(int n) {
uint8_t check = 0x20;
check &= n;
if (check == 0x20) {
n &= ~(1 << 5);
} else {
n |= (1 << 5);
}
return n;
}
int main() {
int n;
scanf("%d", &n);
printf("%d", toggleFifthBit(n));
return 0;
}