Submission #911278

#	Time	Username	Problem	Language	Result	Execution time	Memory
911278		ind1v	Permutation (APIO22_perm)	C++17	91.33 / 100	2 ms	348 KiB

perm

#include <bits/stdc++.h>
#include "perm.h"

using namespace std;

vector<int> construct_permutation(long long x) {
  vector<int> cur;
  int a = 1;
  cur.emplace_back(a);
  while ((1LL << (a + 1)) <= x) {
    a++;
    cur.emplace_back(a);
  }
  vector<int> res;
  int sz = (int) cur.size();
  for (int i = 0; i < sz; i++) {
    res.emplace_back(cur[i]);
    if ((x >> (sz - i - 1) & 1)) {
      res.emplace_back(1);
    }
  }
  int idx = 0;
  set<int> s;
  for (int i = (int) res.size() - 1; i >= 0; i--) {
    if (res[i] == 1) {
      res[i] = idx;
      s.insert(i);
      idx++;
    }
  }
  for (int i = 0; i < (int) res.size(); i++) {
    if (!s.count(i)) {
      res[i] = idx;
      idx++;
    }
  }
  return res;
}

• Subtask 1: 10 / 10
• Subtask 2: 81.333333333 / 90