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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. struct Items {
  5.     int weight;
  6.     int value;
  7.     double value_per_weight;
  8. };
  9.  
  10. bool cmpValuePerWeight(Items a, Items b) {
  11.     return a.value_per_weight > b.value_per_weight;
  12. }
  13.  
  14. int main(void) {
  15.     Items item[100];
  16.     int n, c;
  17.     cin >> n;
  18.  
  19.     for (int i = 0; i < n; i++) {
  20.         cin >> item[i].weight >> item[i].value;
  21.         item[i].value_per_weight = (double)item[i].value / item[i].weight;
  22.     }
  23.  
  24.     cin >> c;
  25.  
  26.     sort(item, item + n, cmpValuePerWeight); 
  27.  
  28.     double max_value = 0;
  29.     for (int i = 0; i < n; i++) {
  30.         if (c >= item[i].weight) {
  31.             max_value += item[i].value;
  32.             c -= item[i].weight;
  33.         } else {
  34.             max_value += item[i].value_per_weight * c;
  35.             break;
  36.         }
  37.     }
  38.  
  39.     cout << fixed << setprecision(2) << max_value << endl;
  40.  
  41.     return 0;
  42. }
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/AXazLJ
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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