Submission #1064981

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1064981	2024-08-18 20:46:59	sammyuri	Permutation (APIO22_perm)	C++17	91.33 / 100	4 ms	348 KiB

perm

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#include "perm.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
std::vector<int> construct_permutation(long long k) {
  // build initial permutation
  ll curpow = 2;
  vector<int> ans = {0};
  while (curpow * 2 <= k) {
    curpow *= 2;
    ans.push_back(ans.back() + 1);
  }
  if (curpow == k)
    return ans;
  // start adding extras
  k -= curpow;
  while (k) {
    curpow = 1;
    int i = 0;
    while (curpow * 2 <= k) {
      curpow *= 2;
      i ++;
    }
    k -= curpow;
    vector<int> newans;
    int seen = 0;
    if (i == 0) newans.push_back(-1);
    for (auto a : ans) {
      newans.push_back(a);
 
 
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Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:41:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |  for (int i = 0; i < ans.size(); i ++)
      |                  ~~^~~~~~~~~~~~

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