Submission #1067052

#	Time	Username	Problem	Language	Result	Execution time	Memory
1067052		duckindog	A Difficult(y) Choice (BOI21_books)	C++17	0 / 100	7 ms	1112 KiB

books

#include <bits/stdc++.h>

#include "books.h"

using namespace std;

void solve(int n, int k, long long a, int s) {
  vector<long long> x(n + 1);
  for (int i = 1; i <= n; ++i) x[i] = skim(i);

  vector<bool> mk(n + 1);

  auto done = [&]() { 
    vector<int> ret;
    for (int i = 1; i <= n; ++i) if (mk[i]) ret.push_back(i);
    answer(ret);
    exit(0);
  };

  long long total = 0;
  int cnt = 0;
  int it = n;
  do {
    for (int i = it; i >= 1; --i) { 
      if (mk[i]) continue;
      if (total + x[i] <= 2 * a) { 
        total += x[i];
        mk[i] = true;
        cnt += 1;
      }
      if (a <= total && cnt == k) done(); 
    }
    for (int i = it; i >= 1; --i) { 
      if (mk[i]) { 
        total -= x[i];
        mk[i] = false;
        cnt -= 1;
        it = i - 1;
        break;
      }
    }
    if (!it) break;
  } while (true);

  impossible();
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 15
• Subtask 3: 0 / 10
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20