func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(false);     cin.tie(0);     int T;     cin >> T;     while (T--) {       int result = 0;       int a[105];       int n;       cin >> n;       for (int i = 1; i <= n; i++) {         cin >> a[i];         if (a[i] - result - i > 0) {           result += a[i] - result - i;         }       }       cout << result << endl;     }     return 0;   }   