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Cod sursa(job #778931)
#include <cstdio>
using namespace std;
int t, n, a, xorsum;
int main()
{
freopen("nim.in", "r", stdin);
freopen("nim.out", "w", stdout);
scanf("%d", &t);
while ( --t )
{
scanf("%d", &n);
xorsum = 0;
for (int i = 1; i <= n; ++i)
{
scanf("%d", &a);
xorsum = xorsum ^ a;
}
if ( xorsum )
printf("DA\n");
else
printf("NU\n");
}
}