#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main(void)
{
    char S[11];
    scanf("%s", S);
    if(S[0] == 'x')
    {
    	char tmp[10];
        double x, y;
        for(int i = 1; i < 11; i++)
        {
            tmp[i-1] = S[i];
        }
        x = pow(2,32);
        y = (double)atoi(tmp);
        long long ans = (long long)(x - y);
        printf("%lld", ans);
    }
    else
    {
        int ans = atoi(S);
        printf("%d", ans);
    }
    return 0;
}