Submission #576823

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
576823	2022-06-13 15:24:49	dutinmeow	Permutation (APIO22_perm)	C++17	100 / 100	2 ms	384 KiB

perm

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include "perm.h"
#include <bits/stdc++.h>
using namespace std;
namespace permutation {
  vector<int> construct_permutation_slow(long long k) {
    vector<int> ret(k - 1);
    for (int i = 0; i < k - 1; i++)
      ret[i] = k - 2 - i;
    return ret;
  }
  
  const array<int, 5> primes = {2, 3, 5, 7, 11};
  vector<int> construct_permutation_dumb(long long k) {
    if (k <= 3)
      return construct_permutation_slow(k);
    for (int p : primes) {
      if (k % p != 0 || k == p)
        continue;
      auto ret = construct_permutation_dumb(k / p);
      auto tem = construct_permutation_dumb(p);
      int r = ret.size();
      for (int t : tem)
        ret.push_back(t + r);
      return ret;
    }
    auto ret = construct_permutation_dumb(k / 2);
    ret.push_back(ret.size());
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

• Subtask 1: 10 / 10
• Subtask 2: 90 / 90