#include <iostream>
#include <stdio.h>
#define  MAX 1000000000
using namespace std;

int main()
{
    int N =0 ;
    while (EOF != scanf("%d", &N))
    {
        if (N < 1 || N > 1000000)
        {
            cout<<"-1"<<endl;
        }
        long long *num = new long long [N +1];
        memset(num, 0, sizeof(long long) * (N+1));

        num[0] = 1;
        num[1] = 1;
        num[2] = 2;
        for (int i = 3; i <= N; ++i)
        {
            if (0 == i%2) //为偶数
            {
                num[i] = (num[i-1] +num[i/2]) %MAX;//把偶数的二进制看成有1的部分，和没有1的部分
            }
            else          //为奇数
            {
                num[i] = num[i-1];
            }

        }
        cout<<num[N]<<endl;
        delete [] num;

    }
    
    return 0;

}

整数分隔