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51 lines (38 loc) · 875 Bytes
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codechef_TREE2.cpp
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51 lines (38 loc) · 875 Bytes
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#include <bits/stdc++.h>
using namespace std ;
int main()
{
int t;
cin >> t ;
while(t--)
{
int n ;
cin >> n ;
int arr[n] ;
set <int> check ;
for(int i=0 ; i<n ; i++)
{
cin >> arr[i] ;
check.insert(arr[i]) ;
}
set<int>::iterator it;
vector <int> v ;
for(it = check.begin() ; it != check.end() ; it++)
{
v.push_back(*it) ;
}
int flag = 0 ;
for (int i=0 ; i<v.size() ; i++)
{
if(v[i] == 0)
{
flag = 1;
cout << v.size() - 1 << endl ;
break;
}
}
if(flag == 0)
cout << v.size() << endl ;
}
return 0;
}