#include <iostream>
#include <queue>

using namespace std;

queue <int> a;


int main(){
    int n,m;
    cin >> n;
    
    for(int i = 0;i < n;i++){
        a.push(i);
    }
    
    int t = 1;
    while(a.size() > 1){
    	if(t % 10 == 0){
    		cout <<a.front();
    		a.pop();
    		continue;
    	}
		a.push(a.front());
		a.pop(); 
	} 
	
}