func_code_string: #include <bits/stdc++.h>   const double EPS = 1e-7;   const double PI = 3.1415926535897932384626;   const int MAXN = 100001;   int n, a[MAXN];   int main() {     std::cin >> n;     for (int i = 1; i <= n; i++) {       std::cin >> a[i];     }     long long answer = 0;     for (int i = 1; i <= n; i++) {       answer += a[i];     }     std::sort(a + 1, a + n + 1);     if (answer & 1) {       for (int i = 1; i <= n; i++)         if (a[i] & 1) {           answer -= a[i];           break;         }     }     std::cout << answer << std::endl;     return 0;   }   