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  1. #include <iostream>
  2.  
  3. using namespace std;
  4. int main() {
  5. 	int n;
  6. 	cin>>n;
  7. 	int* arr = new int[n]; 
  8. 	int* freq = new int[100001]();
  9.     for(int i = 0;  i<n; ++i) {
  10. 	cin>>arr[i];
  11. 	freq[arr[i]]++;
  12. }
  13. int* dp = new int[100001]();
  14. dp[0] = 0;
  15. dp[1] = freq[1];
  16.    for(int i = 2; i<=100001; i++) {
  17.    	dp[i] = max(dp[i-1], dp[i-2] + i*freq[i]);
  18.  
  19.    }
  20.  
  21.  	cout<<dp[100001];
  22.  
  23.  
  24.  
  25.  
  26.  
  27.  
  28. }
  29.  
Success #stdin #stdout 0s 4340KB
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https://ideone.com/iYAK0R
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
secret

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