#include<bits/stdc++.h>
using namespace std;
int main(){
	int M,head,tail,sum=0;
	cin>>M;
	for(int i=1; i<=M/2; i++){
		head=i;
		for(int j=i; j<=M-1; j++){
			tail=j;
			
			sum+=j;
			if(sum==M){
				cout<<head<<" "<<tail<<"\n";
				sum=0;
			}else if(sum>M){
				sum=0;
				break;
			}
		}
	}
	return 0;
}