#include <iostream>
#include <cmath>
using namespace std();
int main()
{
int n;
if(n % 2 == 1)
{
int p = 0, i = 0;
while(n)
{
if(n % 2 == 0)p++;
else i++;
}
}
else
{
while(n >= 1000)
n/=10;
if(sqrt(n) == (int)sqrt(n);
cout << "DA";
else
cout << "NU";
}
}
}