Submission #973451

#	Time	Username	Problem	Language	Result	Execution time	Memory
973451		CDuong	Permutation (APIO22_perm)	C++17	100 / 100	2 ms	432 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, sz = (int)binary.size(), cntt = 0;
	for (int i = 1; i < sz; ++i) {
		dq.emplace_back(cnt++);
		if (binary[i]) {
			if (i + 1 < sz and binary[i + 1] and cntt > 1) {
				dq.emplace_back(cnt++);
				dq.insert(dq.begin() + 2, cnt++);
				++i;
			}
			else dq.emplace_front(cnt++), cntt++;
		}
	}
	return {dq.begin(), dq.end()};
}

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