#include <stdio.h>
int toggleFifthBit(int n) {
// Isolate if fifth bit is 0 or 1
int fifthBit = (n & (1 << 5)) >> 5;
if (fifthBit == 1){
// clear only the 5th bit
n &= ~(1 << 5);
}
else
{
// set that bit
n |= (1 << 5);
}
return n;
}
int main() {
int n;
scanf("%d", &n);
printf("%d", toggleFifthBit(n));
return 0;
}