#include <stdio.h>
#define TOOGLED_BIT_POSITION 5
int toggleFifthBit(int n) {
// Write your code here
// if(n < 0){
// printf("The Number you have inter in Negative\n");
// return 0;
// }
n ^= (1 << TOOGLED_BIT_POSITION);
return n;
}
int main() {
int n;
scanf("%d", &n);
printf("%d", toggleFifthBit(n));
return 0;
}