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  1. #include <bits/stdc++.h>
  2. #include <ext/pb_ds/assoc_container.hpp>
  3. #include <ext/pb_ds/tree_policy.hpp>
  4.  
  5. using namespace std;
  6. using namespace __gnu_pbds;
  7. using ll = long long;
  8. using ld = long double;
  9.  
  10. #define all(x)  x.begin(),x.end()
  11. #define v(x) vector<x>
  12. #define nl '\n'
  13. #define fxd(x) fixed << setprecision(x)
  14. template<class t> using ordered_set = tree<t, null_type, less<t>, rb_tree_tag, tree_order_statistics_node_update>;
  15. template<class t> using ordered_multiset = tree<t, null_type, less_equal<t>, rb_tree_tag, tree_order_statistics_node_update>;
  16.  
  17.  
  18. int main()
  19. {
  20.     ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
  21.     int n, k ; cin >> n >> k;
  22.     v(int) stalls(n);
  23.     for (int i = 0; i < n; i++)
  24.     {
  25.         cin >> stalls[i];
  26.     }
  27.     ll l = 0, r = stalls[n-1] , mid , pos = -1;
  28.     while (l <= r)
  29.     {
  30.         mid = (l+r) /2;
  31.         int cows = k-1 , CurrentDistans = 0;
  32.         for (int i = 1; i < n; i++)
  33.         {
  34.             CurrentDistans += stalls[i] - stalls[i-1]; 
  35.             if(cows == 0)
  36.             {
  37.                 break;
  38.             }
  39.             else if (CurrentDistans >= mid)
  40.             {
  41.                 cows--;
  42.                 CurrentDistans = 0;
  43.             }
  44.         }
  45.         if(cows <= 0)
  46.         {
  47.             l = mid+1;
  48.             pos = mid;
  49.         }
  50.         else
  51.         {
  52.             r = mid-1;
  53.         }
  54.     }
  55.     cout << pos;
  56. }
Success #stdin #stdout 4.28s 1725716KB
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https://ideone.com/OpGNvJ
language:
C++ (gcc 8.3)
created:
1 hour ago
visibility:
public

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