Submission #797943

#	Time	Username	Problem	Language	Result	Execution time	Memory
797943		Oyster	Minerals (JOI19_minerals)	C++17	40 / 100	14 ms	2312 KiB

minerals

#include "minerals.h"
#include <vector>
#include <utility>

std::vector<std::pair<int, int>> ans;

void DC(const std::vector<int> &v) {
  int N = v.size() >> 1;
  if (N == 1) return ans.push_back({v[0], v[1]});
  std::vector<int> vl, vr;
  for (const int &i : v) {
    if (Query(i) <= N >> 1) vl.push_back(i);
    else {
      Query(i);
      vr.push_back(i);
    }
  }
  for (const int &i : vl) Query(i);
  DC(vl); DC(vr);
}

void Solve(int N) {
  ans.reserve(N);
  std::vector<int> v(N << 1);
  for (int i = 0; i < v.size(); i++) v[i] = i + 1;
  DC(v);
  for (const auto &p : ans)
    Answer(p.first, p.second);
}

Compilation message (stderr)

minerals.cpp: In function 'void Solve(int)':
minerals.cpp:25:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |   for (int i = 0; i < v.size(); i++) v[i] = i + 1;
      |                   ~~^~~~~~~~~~

• Subtask 1: 6 / 6
• Subtask 2: 25 / 25
• Subtask 3: 9 / 9
• Subtask 4: 0 / 30
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 10