제출 #874246

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
874246		LucaLucaM	Super Dango Maker (JOI22_dango3)	C++17	22 / 100	1166 ms	1108 KiB

dango3

#include "dango3.h"
#ifdef LOCAL
#include "grader.cpp"
#endif // LOCAL

#include <vector>
#include <random>
#include <algorithm>
#include <functional>
#include <cassert>
#include <iostream>

std::mt19937 rng(3192702);

void Solve(int n, int m) {
  /**

  sol in O(n * m^2) query uri:

  pornesc cu toate valorile ramase si de fiecare data incerc sa scot cate 1

  **/

  std::vector<int> id(n * m + 1);
  for (int i = 1; i <= n * m; i++) {
    id[i] = i;
  }
  shuffle(id.begin() + 1, id.end(), rng);

  auto query = [&] (std::vector<int> v) {
    std::vector<int> w;
    for (const auto &x : v) {
      w.push_back(id[x]);
    }
    return Query(w);
  };
  auto answer = [&] (std::vector<int> v) {
    std::vector<int> w;
    for (const auto &x : v) {
      w.push_back(id[x]);
    }
    Answer(w);
  };

  std::function<std::vector<int>(std::vector<int>)> exclude = [&] (std::vector<int> v) {
    bool dont[n * m + 1] = {};
    for (const auto &x : v) {
      dont[x] = true;
    }
    std::vector<int> w;
    for (int i = 1; i <= n * m; i++) {
      if (!dont[i]) {
        w.push_back(i);
      }
    }
    return w;
  };

  bool taken[n * m + 1] = {};

  int SZ = 50'000 / m;

  for (int rep = 0; rep < m; rep++) {
    std::vector<int> cand;
    for (int i = 1; i <= n * m; i++) {
      if (!taken[i]) {
        cand.push_back(i);
      }
    }
    shuffle(cand.begin(), cand.end(), rng);
    if (cand.size() > SZ) {
      cand.resize(SZ);
    }
    std::vector<int> ret;
    ret.push_back(cand[0]);
    for (int i = 1; i < (int) cand.size() && (int) ret.size() < n; i++) {
      std::vector<int> nw = ret;
      nw.push_back(cand[i]);
      if (query(exclude(ret)) == query(exclude(nw))) {
        ret.push_back(cand[i]);
      }
    }
//    std::cout << "! " << (int) ret.size() << '\n';
    answer(ret);
    for (const auto &x : ret) {
      taken[x] = true;
    }
  }

}
/**


3 2
3 3 1 2 1 2

4 4
2 2 3 2 4 4 3 2 3 1 1 3 4 1 4 1


**/

컴파일 시 표준 에러 (stderr) 메시지

dango3.cpp: In function 'void Solve(int, int)':
dango3.cpp:71:21: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   71 |     if (cand.size() > SZ) {
      |         ~~~~~~~~~~~~^~~~

• Subtask 1: 2 / 2
• Subtask 2: 5 / 5
• Subtask 3: 15 / 15
• Subtask 4: 0 / 78