Submission #1067178

#	Time	Username	Problem	Language	Result	Execution time	Memory
1067178		duckindog	A Difficult(y) Choice (BOI21_books)	C++17	20 / 100	154 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);
  assert(x[1] > 0);
  auto d = x;
  for (int i = 1; i <= n; ++i) d[i] += d[i - 1];

  vector<int> ret;
  for (int i = k; i <= n; ++i) { 
    if (a <= d[i] - d[i - k] && d[i] - d[i - k] <= a * 2) { 
      for (int j = i - k + 1; j <= i; ++j) ret.push_back(j);
      answer(ret);
      return;
    }
  }
  
  for (int i = k; i <= n; ++i) { 
    if (a <= d[k - 1] + x[i] && d[k - 1] + x[i] <= 2 * a) { 
      for (int j = 1; j < k; ++j) ret.push_back(j);
      ret.push_back(i);
      answer(ret);
      return;
    }
  }
  impossible();
}

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