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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 , k , a[21] , b[21] , p[21] , cnt = 0 , ans = -1 , cur = 0 , val = 0;
  18.  
  19. void sol(int i)
  20. {
  21.     if (i > n)
  22.     {
  23.         if (cnt == k)
  24.         ans = max(ans , val);
  25.     }
  26.     else
  27.     {
  28.         p[i] = 0;
  29.         sol(i + 1);
  30.  
  31.         int tem = cur;
  32.         if (cnt + 1 <= k && a[i] != cur)
  33.         {
  34.             p[i] = 1;
  35.             cnt++;
  36.             cur = a[i];
  37.             val += b[i];
  38.  
  39.             sol(i + 1);
  40.  
  41.             cur = tem;
  42.             val -= b[i];
  43.             cnt--;
  44.         }
  45.     }
  46. }
  47.  
  48. signed main()
  49. {
  50.     ios_base::sync_with_stdio(0);
  51.     cin.tie(0);  cout.tie(0);
  52.     //freopen(NAME".INP" , "r" , stdin);
  53.     //freopen(NAME".OUT" , "w" , stdout);
  54.  
  55.     cin >> n >> k;
  56.     for (int i = 1 ; i <= n ; i++)
  57.         cin >> a[i] >> b[i];
  58.     sol(1);
  59.     cout << ans;
  60. }
  61. // haronnee_
Success #stdin #stdout 0s 5308KB
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https://ideone.com/es2MEW
H
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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