#include <bits/stdc++.h>

using namespace std;

typedef long long LL;

inline LL read () { LL res =  ;int f () ;char ch = getchar ();

    while (!isdigit(ch)) { if (ch == '-') f = - ;ch = getchar();}

    while (isdigit(ch)) res = (res << ) + (res << ) + (ch ^ ) ,ch = getchar(); return res * f ;

}

LL n;

LL a[<<];

signed main () {

    n=read();

    a[]=; a[]=;

    for(register int i=;i<=n;i++) a[i]=((a[i - ] << )+(a[i - ])) % ;

    cout << a[n] << endl ;

    return ;

}