有大佬看看是哪里错了吗，用得比较蠢得方法，只有25分

#include<iostream>
using namespace std;
int main() 
{
	int n = 0;
	int m = 0;
	int c;
	cin >> c;
	do {
		n++;
		m = m + n;
	} while (m < c);

	int k = c - (m - n);
	cout << k <<"/"<< n + 1 - k;

}