func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     while (t--) {       long long int n;       cin >> n;       long long int mn = 0;       for (int i = 1; i <= n; i++) {         long long int temp;         cin >> temp;         mn = max(mn, (temp - i));       }       cout << mn << endl;     }   }   