func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int n, data, prev = 0, energy = 0;     cin >> n;     vector<long long int> v1(n);     long long int ans = 0;     for (long long int i = 0; i < n; i++) {       cin >> data;       if (energy < (data - prev)) {         ans += ((data - prev) - energy);         energy = 0;         prev = data;       } else {         energy += (prev - data);         prev = data;       }     }     cout << ans;   }   