Submission #776511

#	Time	Username	Problem	Language	Result	Execution time	Memory
776511		Alan	Permutation (APIO22_perm)	C++17	91.33 / 100	2 ms	340 KiB

perm

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

vector<int> construct_permutation(ll k) {
	vector<int> ans;
	int l = 0, r = 150;
	vector<int> bin;
	for (int i = 0; i < 60; i++) bin.push_back(!!((1LL<<i) & k));
	while (!bin.back()) bin.pop_back();
	int sz = bin.size();
	for (int i = 0; i+1 < sz; i++) {
		if (bin[i] && i+2 < sz && bin[i+1]) {
			ans.push_back(r-1);
			ans.push_back(r);
			r -= 2;
			ans.push_back(l++);
			i++;
		} else if (bin[i]) ans.push_back(r--);
		ans.push_back(l++);
	}
	for (auto& x : ans) if (x >= l) x = x - (r-l+1);
	return ans;
}

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