#include <stdio.h>

unsigned obrada(unsigned x);

int main()
{
    unsigned x;
    
    scanf("%u", &x);
    
    printf("%u\n", obrada(x));
 
    return 0;
}

unsigned obrada(unsigned x)
{
    unsigned mask = 7;
    int pomeraj = 0;
    
    while(pomeraj < 8 * sizeof(unsigned) - 3)
    {
        if(((x & mask) >> pomeraj) == 5)
            x = x | mask;
        else if(((x & mask) >> pomeraj) == 2)
            x = x & ~mask;
        
        mask <<= 1;
        pomeraj++;
    }
    
    return x;
}