#include <iostream.h>

int count;
int loop(int n)
{
    for(int i=n/2; i>=1;i--)
    {
        count++;
        loop(i);
    }
    return count+1;
}

int main()
{
    int n;
    while(cin>>n)
    {
        count = 0;
        if(n<=1000)
            cout<<loop(n)<<endl;
    }
    return 0;
}

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