Submission #707473

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
707473	2023-03-09 04:23:37	josanneo22	Permutation (APIO22_perm)	C++17	91.33 / 100	2 ms	468 KiB

perm

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#include "perm.h"
#include<bits/stdc++.h>
using namespace std;
std::vector<int> construct_permutation(long long k)
{
  int pow = 0;
  while ((1ll << pow) <= k) pow++;
  pow--;
  int cnt = pow;
  vector<int> arr(pow, -1);
  for (int i = pow - 1; i >= 0; --i) {
    if (k & (1ll << i)) {
      arr[i] = pow++;
    }
  }
  vector<int> ret;
  for (int i = 0; i < arr.size(); ++i) {
    if (arr[i] != -1) ret.push_back(arr[i]);
    ret.push_back(i);
  }
  return ret;
}
 
 
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Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:17:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |  for (int i = 0; i < arr.size(); ++i) {
      |                  ~~^~~~~~~~~~~~
perm.cpp:9:6: warning: unused variable 'cnt' [-Wunused-variable]
    9 |  int cnt = pow;
      |      ^~~

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