#include <stdio.h>

 #include <string.h>

 #define LL long long

 const int N=;

 LL dp[N][N];

 int main()

 {

     int n;

     while(~scanf("%d",&n))

     {

         memset(dp,,sizeof(dp));

         for (int i = ; i <= n; i++)

             dp[i][i] = ;

         dp[][] = ;

         dp[][] = ;

         for (int i = ; i <= n; i++)

         {

             for (int j = ; j < i; j++)

             {

                 for (int k = ; k < j; k++)

                     dp[i][j]+=dp[i-j][k];

             }

         }

         LL ans = ;

         for (int i = ; i < n; i++)

             ans+=dp[n][i];

         printf("%lld\n",ans);

     }

     return ;

 }