Submission #250200

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
250200	2020-07-17 06:47:22	shenxy	Minerals (JOI19_minerals)	C++14	100 / 100	44 ms	2676 KiB

minerals

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#include "minerals.h"
#include <algorithm>
#include <vector>
using namespace std;
vector<int> firsts, ans;
int lquery = 0;
void recurse(vector<int> &v, int l, int r, bool has = true) {
  if (l != r) {
    int m = l + (r - l) * 0.3;
    for (int i = l; i <= m; ++i) lquery = Query(firsts[i]);
    vector<int> a, b;
    for (int i: v) {
      if (a.size() != m - l + 1 && b.size() != r - m) {
        int x = Query(i);
        if (has == (x != lquery)) a.push_back(i);
        else b.push_back(i);
        if (x != lquery) lquery = x;
      } else if (a.size() != m - l + 1) a.push_back(i);
      else b.push_back(i);
    }
    recurse(a, l, m, !has);
    recurse(b, m + 1, r, has);
  } else ans.push_back(v[0]);
}
void Solve(int N) {
  vector<int> duds;
  for (int i = 1; i <= 2 * N; ++i) {
    int x = Query(i);
    if (x != lquery) firsts.push_back(i), lquery = x;
    else duds.push_back(i);
 
 
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Compilation message (stderr)

minerals.cpp: In function 'void recurse(std::vector<int>&, int, int, bool)':
minerals.cpp:13:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (a.size() != m - l + 1 && b.size() != r - m) {
        ~~~~~~~~~^~~~~~~~~~~~
minerals.cpp:13:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (a.size() != m - l + 1 && b.size() != r - m) {
                                 ~~~~~~~~~^~~~~~~~
minerals.cpp:18:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    } else if (a.size() != m - l + 1) a.push_back(i);
               ~~~~~~~~~^~~~~~~~~~~~

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