#include <vector>
#include <iostream>

using namespace std;

long brojMogucnosti(int number){
    vector<int> mogucnosti(number+1, 0);
    mogucnosti[0] = 1;
    for(int i = 1; i < number; i++){
        for(int j = i; j <= number; j++)
            mogucnosti[j] = mogucnosti[j] + mogucnosti[j-i];
    }
    return mogucnosti[number];
}

int main(){
    cout << "Unesite broj!" << endl;
    int number;
    cin >> number;
    cout << brojMogucnosti(number) << endl;
    return 0;
}