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Cod sursa(job #617234)
#include<stdio.h>
void solve(){
int n,i,x,r;
scanf("%d",&n);
scanf("%d",&r);
for(i=1;i<n;++i){
scanf("%d",&x);
r^=x;
}
if(!r)
printf("NU\n");
else
printf("DA\n");
}
int main(){
freopen("nim.in","r",stdin);
freopen("nim.out","w",stdout);
int t;
scanf("%d",&t);
for(;t;--t)
solve();
fclose(stdin);
fclose(stdout);
return 0;
}