func_code_string: #include <bits/stdc++.h>   using namespace std;   int n;   long long a[30];   int main() {     cin >> n;     for (int i = 0; i < n; i++) {       cin >> a[i];     }     sort(a, a + n);     long long now = a[n - 1];     long long ans = 0;     for (int i = n - 1; i >= 0; i--) {       now = min(now, a[i]);       ans += now;       now--;       if (now < 0) break;     }     cout << ans << endl;     return 0;   }   