#include <bits/stdc++.h>

using namespace std;


int Peach() {
    int n = 1;
    for (int i = 1; i <= 9; i++)
        n = (n + 1) * 2;
    printf("%d\n", n);
    return n;
}

int main() {
    //10---1
    //9---4
    //8---10
    //递推版本
    Peach();
    return 0;
}