Submission #897002

#	Time	Username	Problem	Language	Result	Execution time	Memory
897002		vjudge1	Permutation (APIO22_perm)	C++17	71.22 / 100	11 ms	1444 KiB

perm

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

using namespace std;

#define ll long long

const int N = 5e3+3, M = 2e2+2;
const ll L = 62;

vector<int> construct_permutation(ll k)
{	
	vector<int> p;
	if (!k) return p;
	k--;
	
		int r = N;
		//vector<int> p2;
		for (int j = L; j > 0; j--) {
			//cerr << k << " " << j << " " << (1ll << j) << " " << (1ll << j) - 1ll << endl;
			if (k >= (1ll << j) - 1ll) {
				k -= (1ll << j) - 1ll;
				for (int l = 1; l <= j; l++) {
					/*p2*/p.push_back(r-j+l);
				}
				//cerr << j << endl;
				r -= j;
				j = L+1;
			}
		}

		/*if (p.empty() || p2.size() < p.size()) swap(p, p2);
	}*/

	int sz = p.size();
	for (int i = 0; i < sz; i++) {
		p[i] -= N-sz+1;
	}

	return p;
}

• Subtask 1: 10 / 10
• Subtask 2: 61.215384618 / 90