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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int long long
  4. #define vi vector<int>
  5. #define fi first
  6. #define se second
  7. #define pb push_back
  8. #define ii pair<int , int>
  9. #define pq priority_queue
  10. #define iii pair<int , pair<int , int>>
  11. #define fo(i,l,r) for(int i=l;i<=r;i++)
  12. #define fod(i,r,l) for(int i=r;i>=l;i--)
  13. #define fill(f,x) memset(f,x,sizeof(f))
  14. #define NAME "file"
  15.  
  16. const int N = 2e5 + 5, mod = 1e9 + 7;
  17. int n , U , V , a[21] , b[21] , p[21] , ans = 0;
  18.  
  19. void sol(int i)
  20. {
  21.     if (i > n)
  22.     {
  23.         int wei = 0 , val = 0;
  24.         for (int j = 0 ; j <= n ; j++)
  25.         {
  26.             wei += p[j] * a[j]; // giống if (p[j]) wei += a[j]
  27.             val += p[j] * b[j];
  28.         }
  29.         if (wei >= U && wei <= V)
  30.             ans = max(ans , val);
  31.     }
  32.     else
  33.     {
  34.        for (int j = 0 ; j <= 1 ; j++)
  35.        {
  36.             p[i] = j;
  37.             sol(i + 1);
  38.        }
  39.     }
  40. }
  41.  
  42. signed main()
  43. {
  44.     ios_base::sync_with_stdio(0);
  45.     cin.tie(0);  cout.tie(0);
  46.     //freopen(NAME".INP" , "r" , stdin);
  47.     //freopen(NAME".OUT" , "w" , stdout);
  48.  
  49.     cin >> n >> U >> V;
  50.     for (int i = 1 ; i <= n ; i++)
  51.         cin >> a[i] >> b[i];
  52.     sol(1);
  53.     cout << ans;
  54. }
  55. // haronnee_
Success #stdin #stdout 0s 5332KB
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https://ideone.com/EJlNyP
quay lui nhánh cận - G
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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