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alora1.cpp
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#include <bits/stdc++.h>
using namespace std;
#define lli long long int
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
// #ifndef ONLINE_JUDGE
// freopen("input.txt","r",stdin);
// freopen("output.txt","w",stdout);
// #endif
lli t,z;
cin>>t;
for(z=1;z<=t;z++)
{
long long int n,x,flag=0;
cin>>n;
long long int array[n];
for(x=0;x<n;x++)
{
cin>>array[x];
}
sort(array,array+n);
for(x=0;x<n-1;x++)
{
if(array[x]==array[x+1])
{
flag=1;
break;
}
}
if(flag==1)
{
cout<<"yes"<<endl;
}
else
{
cout<<"no"<<endl;
}
}
return 0;
}