func_code_string: #include <bits/stdc++.h>   using ll = long long;   using namespace std;   void debugi(vector<int>& vec) {     int n = (int)vec.size();     for (int i = 0; i < n; i++) {       cout << vec[i] <<    ;     }     cout << endl;   }   void debugl(vector<ll>& vec) {     int n = (int)vec.size();     for (int i = 0; i < n; i++) {       cout << vec[i] <<    ;     }     cout << endl;   }   void debugmap(map<int, int>& mp) {     for (auto x : mp) {       cout << x.first <<     << x.second <<   ,  ;     }     cout << endl;   }   void debugset(set<int>& st) {     for (auto x : st) {       cout << x <<    ;     }     cout << endl;   }   void debugparri(vector<pair<int, int>>& arr) {     for (int i = 0; i < (int)arr.size(); i++) {       cout <<  [  << arr[i].first <<   :   << arr[i].second <<  ]             <<    ;     }     cout << endl;   }   void debugpi(pair<int, int>& pi) {     cout << pi.first <<     << pi.second << endl;   }   void debugq(queue<int> q) {     while (!q.empty()) {       cout << q.front() <<    ;       q.pop();     }     cout << endl;   }   ll mod = 1000000007;   bool check(int n, int i, int j) {     if ((0 <= i & i < n) && (0 <= j & j < n)) {       return true;     }     return false;   }   int main(int argc, const char* argv[]) {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int t;     cin >> t;     for (int tt = 0; tt < t; tt++) {       int n;       cin >> n;       vector<int> arr(n);       for (int i = 0; i < n; i++) {         cin >> arr[i];       }       vector<int> pre(n), suf(n);       int s = 0;       for (int i = 0; i < n; i++) {         if (arr[i] != i + 1) {           s += 1;         }         pre[i] = s;       }       s = 0;       for (int i = n - 1; i >= 0; i--) {         if (arr[i] != i + 1) {           s += 1;         }         suf[i] = s;       }       int cnt = 0;       for (int i = 0; i < n; i++) {         if (pre[i] != 0 && suf[i] != 0 && arr[i] == i + 1) {           cnt += 1;         }       }       if (cnt == 0) {         if (s == 0) {           cout << 0 << endl;           continue;         } else {           cout << 1 << endl;           continue;         }       }       cout << 2 << endl;       continue;     }     return 0;   }   