func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(false);     cin.tie(0);     int tt;     cin >> tt;     while (tt--) {       int n;       cin >> n;       vector<int> a(n + 1);       for (int i = 1; i <= n; i++) {         cin >> a[i];       }       int lo = 1, hi = n;       while (a[lo] == lo && lo <= n) lo++;       while (a[hi] == hi && hi >= 0) hi--;       if (lo == n + 1 || hi == -1) {         cout << 0 <<   n ;         continue;       }       int ans = 1;       for (int i = lo; i <= hi; i++) {         if (a[i] == i) {           ans++;           break;         }       }       cout << ans <<   n ;     }     return 0;   }   