EVw0fh - Online C++ Compiler & Debugging Tool

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

int main() {


    int t;
    cin>>t;
    while(t--)
    {
      int n,i,k,flag=0;
      cin>>n;
      int a[100],b[100];
      int arr[2];
      int ar[2];


      for(i=0;i<n;i++)
      {
        cin>>a[i];
        arr[a[i]]++;
      }
      for(i=0,k=0;i<n;i++,k++)
      {
        cin>>b[i];
        ar[b[i]]++;
        if(b[i]!=a[k])
        flag=1;
      }
      if(arr[0]!=ar[0]||arr[1]!=ar[1]&&flag)
      cout<<"2"<<endl;
      else if(flag||arr[0]!=ar[0]&&arr[1]!=ar[1])
      cout<<"1"<<endl;
      else
      cout<<"0"<<endl;

    }


    return 0;
}