#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include <map>
#include <vector>
#include <queue>
#include <deque>
#include <set>
#include <stack>
#include <algorithm>
#include <array>
#include <unordered_set>
#include <unordered_map>
#include <string>
using namespace std;

bool rcmp(int a, int b) { return a>b; }
typedef long long LL;



char ib[32];
int main() {
    int n, i;
    LL v, m=1;
    m<<=32;
    scanf("%s", ib);
    if (ib[0]=='x') {
        sscanf(ib+1, "%lld", &v);
        v=m-v; 
    } else sscanf(ib, "%lld", &v);
    printf("%lld\n", v);

    return 0;
}