Submission #968412

#	Time	Username	Problem	Language	Result	Execution time	Memory
968412		12345678	Permutation (APIO22_perm)	C++17	91.33 / 100	2 ms	348 KiB

perm

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

using namespace std;

#define ll long long

int mx, cnt;
ll p[62];
vector<int> res, l;

std::vector<int> construct_permutation(long long k)
{
    p[0]=1;
    for (int i=1; i<62; i++) p[i]=p[i-1]*2;
    mx=cnt=0;
    res.clear();
    l.clear();
    ll tmp=k;
    while (tmp>0)
    {
        if (tmp%2==1) mx=max(mx, cnt), l.push_back(cnt);
        tmp/=2;
        cnt++;
    }
    for (int i=0; i<mx; i++) res.push_back(i);
    l.pop_back();
    reverse(l.begin(), l.end());
    for (auto x:l)
    {
        for (int i=x; i<res.size(); i++) res[i]++;
        res.push_back(x);
    }
    //for (auto x:res) cout<<x<<' ';
    //cout<<'\n';
	return res;
}

//0 1 2 3 4 5
//1 2 4 8 16 32

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:31:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |         for (int i=x; i<res.size(); i++) res[i]++;
      |                       ~^~~~~~~~~~~

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