#include <bits/stdc++.h>
using namespace std;
#define GG ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
bool BS(long long s)
{ long long l=1,mid,r=sqrt(s);
  while(l<=r)
  { mid=(l+r)/2;
  	if( (mid*mid)==s )
  	return 1;
  	else if( (mid*mid)>s )
  	r=mid-1;
  	else
  	l=mid+1;
  }
return 0;
}
 
int main () { GG;
int t; cin>>t;
while(t--) {
long long n,sum=0; cin>>n;
int a[n];
for(int i=0;i<n;i++) 
{ cin>>a[i];
 sum+=a[i]; }
 
if( BS(sum) ) cout<<"YES\n";
else	  cout<<"NO\n";
}return 0;}

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NQoxCjkKMgoxNCAyCjcKMSAyIDMgNCA1IDYgNwo2CjEgMyA1IDcgOSAxMQo0CjIgMiAyIDIK

5
1
9
2
14 2
7
1 2 3 4 5 6 7
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1 3 5 7 9 11
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2 2 2 2