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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define int long long
  5. #define sz(x) x.size()
  6. #define all(v) v.begin(), v.end()
  7. #define allr(v) v.rbegin(), v.rend()
  8. #define F first
  9. #define S second
  10.  
  11. bool canForm(vector<int> &students, int k, int councils)
  12. {
  13.     int sum = 0;
  14.     for (int x : students) 
  15.         sum += min(x, councils);
  16.     return sum >= councils * k;
  17. }
  18.  
  19. void solve()
  20. {
  21.     int k, n; cin >> k >> n;
  22.     vector<int> a(n);
  23.     int l = -1, r;
  24.     for (int i = 0; i < n; ++i) cin >> a[i], r += a[i];
  25.     while (l < r - 1) 
  26.     {
  27.         int mid = l + (r - l) / 2;
  28.         if (canForm(a, k, mid)) 
  29.             l = mid;
  30.         else
  31.             r = mid;    
  32.     }
  33.     cout << l;
  34. }
  35.  
  36. signed main()
  37. {
  38.     ios_base::sync_with_stdio(false), cin.tie(nullptr);
  39.     int tc = 1;
  40.     // cin >> tc;
  41.     while (tc--)
  42.     {
  43.         solve();
  44.         if (tc)
  45.             cout << '\n';
  46.     }
  47.     return 0;
  48. }
Success #stdin #stdout 0.01s 5320KB
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75413707382245
https://ideone.com/RaX1PY
language:
C++14 (gcc 8.3)
created:
17 days ago
visibility:
public

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