计算x^2=(1^2+2^2+3^2+...+n^2)/n的公式，利用C语言循环的算法怎么才能实现这个问题的呢？

Question

Problem Description
Find the biggest integer n (1 <= n <= N) and an integer x to make them satisfy

Input
The input consists of several test cases. Each test case contains a integer N, 1<=N<=10^18.The input ends with N = 0.

Output
In one line for each case, output two integers n and x you have found.

Sample Input
1
2
0

Sample Output
1 1
1 1

Answer 1

int mun=0
for(int i = 1,i<=n,i++)
{mun=mun+i^2}
x^2=mun/n;