Submission #644799

#	Time	Username	Problem	Language	Result	Execution time	Memory
644799		Tenis0206	Permutation (APIO22_perm)	C++17	91.33 / 100	2 ms	340 KiB

perm

#include <bits/stdc++.h>

using namespace std;

int fr[100005];

vector<int> construct_permutation(long long k)
{
    int nr = 0;
    long long aux = k;
    while(aux!=1)
    {
        ++nr;
        aux /= 2;
    }
    vector<int> suf;
    for(int b=0;b<nr;b++)
    {
        if((k & (1LL<<b)) != 0)
        {
            suf.push_back(b + suf.size());
        }
    }
    reverse(suf.begin(),suf.end());
    for(auto it : suf)
    {
        ++fr[it];
    }
    int cnt = 0;
    vector<int> rez;
    for(int i=1;i<=nr;i++)
    {
        while(fr[cnt])
        {
            ++cnt;
        }
        rez.push_back(cnt);
        ++cnt;
    }
    for(auto it : suf)
    {
        rez.push_back(it);
    }
    for(int i=0;i<rez.size();i++)
    {
        fr[i] = 0;
    }
    return rez;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:44:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |     for(int i=0;i<rez.size();i++)
      |                 ~^~~~~~~~~~~

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