Easy Math

     Given nn integers a1,a2,…,ana1,a2,…,an, check if the sum of their square root a1−−√+a2−−√+⋯+an−−√a1+a2+⋯+an is a integer.

Input

The input consists of multiple tests. For each test:

The first line contains 11 integer nn (1≤n≤1051≤n≤105). The second line contains nnintegers a1,a2,…,ana1,a2,…,an (0≤ai≤1090≤ai≤109).

Output

For each test, write "Yes" if the sum is a integer, or "No" otherwise.

Sample Input

    2
    1 4
    2
    2 3

Sample Output

    Yes

思路：

     判断是不是整数

代码：

#include
#include
using namespace std;
int main(){
	int n;
	cin>>n;
	while(~scanf("%d",&n)){
		int flag=0;
		while(n--)
		{
			int num;
		    scanf("%d",&num);
		    int tmp=sqrt(num);
		    if(tmp*tmp!=num){
		    	flag=1;
			}
		}
	    if(flag) cout<<"No"<