func_code_string: #include <bits/stdc++.h>   using namespace std;   const int INF = 1000000000;   long long A[100005];   map<long long, long long> mp;   int main() {     long long n, a, i;     cin >> n;     for (i = 1; i <= n; i++) {       cin >> a;       mp[a] += a;     }     A[1] = mp[1];     A[0] = 0;     for (i = 2; i <= 100000; i++) {       A[i] = max(A[i - 1], A[i - 2] + mp[i]);     }     cout << A[100000] << endl;     return 0;   }   