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cm164364.cpp
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cm164364.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++)
{
lli n,xx,x,flavour=1;
cin>>n;
cin>>xx;
lli array[n];
for(x=0;x<n;x++)
{
cin>>array[x];
}
sort(array,array+n);
for(x=1;x<n;x++)
{
if(array[x]!=array[x-1])
{
flavour=flavour+1;
}
}
if(flavour>=n-xx)
{
cout<<n-xx<<endl;
}
else
{
cout<<flavour<<endl;
}
}
return 0;
}