problem_difficulties.cpp

#include <bits/stdc++.h>
using namespace std;

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    int t;
    cin>>t;
    while (t--)
    {
        int a[4];
        for(int i = 0; i < 4; i++)
        cin>>a[i];
        sort(a,a+4);
        if((a[0]==a[1])&&(a[1]==a[2])&&(a[2]==a[3]))
        cout<<"0"<<endl;
        else if(((a[0]==a[1])&&(a[1]==a[2]))||((a[1]==a[2])&&(a[2]==a[3])))
        cout<<"1"<<endl;
        else
        cout<<"2"<<endl;
    }
    return 0;
}