原题链接

哪位大佬帮我看看哪里错了。。

我的WA代码：

#include <iostream>
#include <cstdio>
#include <algorithm>
using namespace std;

const int N = 1e6 + 10;
int n, m;

bool xx(int k)
{
	int l = 1, r = k - 1;
	while (l < r)
	{
		int mid = (l + r + 1) >> 1;
		if (mid * mid <= k)
			l = mid;
		else
			r = mid - 1;
	}
	return l * l == k;
}
int main()
{
	scanf("%d%d", &n, &m);
	
	for (int i = n; i <= m; i++)
	{
		int temp = i;
		for (int j = 10; temp / j > 0; j *= 10)
		{
			if (xx(i) && xx(temp / j) && xx(temp % j))
				printf("%d\n", i);
		}
	}
	return 0;
}