func_code_string: #include <bits/stdc++.h>   using namespace std;   int num[200000];   long long cnt[200000] = {0};   long long dp[200000] = {0};   long long sum[200000] = {0};   int main() {     int n;     cin >> n;     for (int i = 0; i < n; ++i) {       cin >> num[i];       cnt[num[i]]++;     }     long long ans = 0;     for (int i = 1; i < 200000; ++i) {       if (i > 1) {         dp[i] = max(dp[i - 2] + cnt[i] * i, dp[i - 1]);       } else {         dp[i] = cnt[i] * i;       }       ans = max(ans, dp[i]);     }     cout << ans << endl;     return 0;   }   