球条优化

#include <bits/stdc++.h>
using namespace std;
int n;
signed main(){
	cin >> n;
	for (long long i = 1;i <= n;i++){
		for (int j = i + 1;j <= n;j++){
			long long cnt = 0;
			for (int t = i;t <= j;t++){
				cnt += t;
			}
			if (cnt == n) cout << i << " " << j << "\n";
		}
	}
	return 0;
}