#include <stdio.h>
int main() {
    int x = (1<<21) + (1<<17) + (1<<13) + (1<<9) + (1<<7) + (1<<1);
    int mask = (1<<8)-1;
    int res = 0;
    for (int i=0; i<3; i++) {
        res = res ^ (mask&x);
        x = (x>>8);
    }
    printf("%d\n", res);
    return 0;
}