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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. using namespace std;
  5. using namespace __gnu_pbds;
  6. typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> orderedset;
  7. #define MO2 ios_base::sync_with_stdio(false);cin.tie(NULL);
  8. #define endl '\n'
  9. #define int long long
  10. #define elif else if
  11. #define sz(x) long(x.size())
  12. #define all(vec) vec.begin(), vec.end()
  13. const int mod = 1e9 + 7;
  14. const int dx[] = {0, -1, 0, 1, 1, -1, 1, -1};
  15. const int dy[] = {-1, 0, 1, 0, 1, 1, -1, -1};
  16.  
  17.  
  18. int n, m, k;
  19. string s, z;
  20. void dope() {}
  21. bool can (int mid) {
  22.     int seats = (m / mid) * mid;
  23.     if (m - seats < mid - 1)
  24.         seats -= mid;
  25.     int rem = m - (seats + mid + 1);
  26.     seats += rem;
  27.     return seats * n >= k;
  28. }
  29. int BS() {
  30.     int l = 1, r = m, ans = -1;
  31.     while (l <= r) {
  32.         int mid = (l + r) / 2;
  33.         if (can (mid)) {
  34.             ans = mid;
  35.             r = mid - 1;
  36.         }
  37.         else
  38.             l = mid + 1;
  39.     }
  40.     return ans;
  41. }
  42. void solve() {
  43.     cin >> n >> m >> k;
  44.     cout << BS();
  45. }
  46. signed main() {
  47.     MO2
  48. #if ONLINE_JUDGE || CPH
  49. #else
  50.     freopen("Input.txt", "r", stdin);
  51.     freopen("Output.txt", "w", stdout);
  52. #endif
  53.     int nop = 1;  cin >> nop;
  54.     while (nop--)
  55.     {
  56.         solve();
  57.         if (nop)
  58.             cout << endl;
  59.     }
  60.     return 0;
  61. }
Success #stdin #stdout 0.01s 5284KB
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https://ideone.com/Bm5SqJ
language:
C++ (gcc 8.3)
created:
11 days ago
visibility:
public

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