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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. long long maxTip(vector<long long> a, vector<long long> b, int x, int y, int n){
  5.  
  6. 	vector<long long> diff(n);
  7. 	long long old_sum = 0, maxTip = LLONG_MIN;
  8.  
  9. 	for (int i = 0; i < n; i++){
  10. 		diff[i] = a[i] - b[i];
  11. 		old_sum += b[i];
  12. 	}
  13.  
  14. 	sort(diff.begin(), diff.end(), greater<long long>());
  15.  
  16. 	vector<long long> prefixD(n+1, 0);
  17. 	for (int i = 1; i <= n; i++){
  18. 		prefixD[i] = prefixD[i-1] + diff[i - 1];
  19. 	}
  20.  
  21. 	maxTip = max(maxTip, old_sum);
  22.  
  23. 	for(int i = 1; i <= n; i++){
  24.  
  25. 		if((i <= x) && ((n-i) <= y)){
  26.  
  27. 			long long new_sum = old_sum + prefixD[i];
  28. 			maxTip = max(maxTip, new_sum);
  29.  
  30. 		}
  31. 	}
  32.  
  33.  
  34. 	return maxTip;
  35.  
  36.  
  37. }
  38.  
  39. int main() {
  40. 	// your code goes here
  41. 	int n, x, y;
  42. 	cin >> n >> x >> y;
  43. 	vector<long long> a(n);
  44. 	vector<long long> b(n);
  45.  
  46. 	for (int i = 0; i < n; i++){
  47. 		cin >> a[i];
  48. 	}
  49. 	for (int i = 0; i < n; i++){
  50. 		cin >> b[i];
  51. 	}
  52.  
  53. 	cout << maxTip(a, b, x, y, n);
  54. 	return 0;
  55. }
Success #stdin #stdout 0.01s 5308KB
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21
https://ideone.com/NdZryu
language:
C++14 (gcc 8.3)
created:
10 days ago
visibility:
public

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