为什么没有AC

#include<bits/stdc++.h>
#define int long long
using namespace std;
int n, x, y;

signed main () {
	cin >> n;
	int m = n;
	for (int i = 1; ;i ++) {
		if (m - i <= 0) {
			x = 0, y = i + 1;
			for (int j = 1;j <= m;j ++) {
				x ++, y --;
			}
			break;
		}
		m -= i;
	}
	cout << x << "/" << y;
	return 0;
}