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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. long maxSubarraySum(const vector<int>& arr) {
  5.     long maxSum = arr[0], currentSum = arr[0];
  6.     for (size_t i = 1; i < arr.size(); ++i) {
  7.         currentSum = max((long)arr[i], currentSum + arr[i]);
  8.         maxSum = max(maxSum, currentSum);
  9.     }
  10.     return maxSum;
  11. }
  12.  
  13. long calculateMaxQualityScore(int impactFactor, vector<int> ratings) {
  14.     int n = ratings.size();
  15.  
  16.     // Step 1: Get original quality score
  17.     long originalScore = maxSubarraySum(ratings);
  18.  
  19.     // Step 2: Strategy 1 - Amplify Ratings
  20.     vector<int> deltaAmplify(n);
  21.     for (int i = 0; i < n; ++i)
  22.         deltaAmplify[i] = ratings[i] * impactFactor - ratings[i];
  23.  
  24.     long maxDeltaAmplify = deltaAmplify[0], curr = deltaAmplify[0];
  25.     for (int i = 1; i < n; ++i) {
  26.         curr = max((long)deltaAmplify[i], curr + deltaAmplify[i]);
  27.         maxDeltaAmplify = max(maxDeltaAmplify, curr);
  28.     }
  29.  
  30.     // Step 3: Strategy 2 - Adjust Ratings
  31.     vector<int> deltaAdjust(n);
  32.     for (int i = 0; i < n; ++i) {
  33.         int adjusted;
  34.         if (ratings[i] >= 0)
  35.             adjusted = floor((double)ratings[i] / impactFactor);
  36.         else
  37.             adjusted = ceil((double)ratings[i] / impactFactor);
  38.         deltaAdjust[i] = adjusted - ratings[i];
  39.     }
  40.  
  41.     long maxDeltaAdjust = deltaAdjust[0]; curr = deltaAdjust[0];
  42.     for (int i = 1; i < n; ++i) {
  43.         curr = max((long)deltaAdjust[i], curr + deltaAdjust[i]);
  44.         maxDeltaAdjust = max(maxDeltaAdjust, curr);
  45.     }
  46.  
  47.     return max({originalScore, originalScore + maxDeltaAmplify, originalScore + maxDeltaAdjust});
  48. }
  49. int main() {
  50.     int impactFactor, n;
  51.     cin >> impactFactor >> n;
  52.  
  53.     vector<int> ratings(n);
  54.     for (int i = 0; i < n; ++i) {
  55.         cin >> ratings[i];
  56.     }
  57.  
  58.     long result = calculateMaxQualityScore(impactFactor, ratings);
  59.     cout << result << endl;
  60.  
  61.     return 0;
  62. }
Success #stdin #stdout 0s 5288KB
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https://ideone.com/FR0nP8
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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