B.cpp

/*
 © 2021-05-16 03:00:01 Franco1010 All Rights Reserved
*/

// #pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")
// #pragma GCC target("avx,avx2,fma")
#include <bits/stdc++.h>
#define f first
#define s second
#define fore(i,a,b) for(int i = (a), ThxMK = (b); i < ThxMK; ++i)
#define pb push_back
#define all(s) begin(s), end(s)
#define _ ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define sz(s) int(s.size())
#define ENDL '\n'
using namespace std;
typedef long double ld;
typedef long long lli;
typedef pair<lli,lli> ii;
typedef vector<lli> vi;
#define deb(x) cout << #x": " << (x) << endl;

int main(){ _
  // freopen("file.in","r",stdin);
  // freopen("file.out","w",stdout);
  lli t; cin >> t;
  while(t--){
    lli n; cin >> n;
    vi v(n); for(auto & i : v) cin >> i;
    bool yes = true;
    fore(i, 0, n){
      if(v[i] != i + 1) yes = false;
    }
    if(yes) cout << 0 << ENDL;
    else if(v[0] == n and v[n - 1] == 1) cout << 3 << ENDL;
    else if(v[0] == 1 or v[n - 1] == n) cout << 1 << ENDL;
    else cout << 2 << ENDL;
  }
  return 0;
}