Submission #973426

#	Time	Username	Problem	Language	Result	Execution time	Memory
973426		CDuong	Permutation (APIO22_perm)	C++17	91.33 / 100	2 ms	600 KiB

perm

#include "perm.h"
#include <bits/stdc++.h>
using namespace std;

vector<int> construct_permutation(long long k)
{
	vector<int> binary;
	while (k) {
		binary.push_back(k & 1);
		k >>= 1;
	}
	reverse(binary.begin(), binary.end());

	deque<int> dq; 
	int cnt = 0;
	for (int i = 1; i < (int)binary.size(); ++i) {
		dq.emplace_back(cnt++);
		if (binary[i]) dq.emplace_front(cnt++);
	}
	return {dq.begin(), dq.end()};
}

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