Chef and Races codechef solution in c++
#include<iostream>
#include<algorithm>
#include<vector>
#define ll long long
using namespace std;
void solve()
{
vector<ll> v(4);
for (int i = 0; i < 4; i++)
{
cin >> v[i];
}
sort(v.begin(), v.end());
v.erase(unique(v.begin(), v.end()), v.end());
ll n = v.size();
if (n == 4)
cout << n / 2 << "\n";
else
cout << (n - 1) / 2 << "\n";
}
int main()
{
int t;
cin >> t;
while (t--)
{
solve();
}
return 0;
}