//暴力解
#include<iostream>
using namespace std;

int n; 
int cnt, abc;
int ans;

int main(){
	cin >> n;
	
	for(int i = 1; i <= n; ++i){
		cnt = 0, abc = i;
		while(cnt < n && abc > 0){
			cnt += abc;
			--abc;
		}
		if(cnt == n){
			++ans;
		}
	}
	
	cout << ans << endl;
	
	return 0;
}