Submission #954489

#	Time	Username	Problem	Language	Result	Execution time	Memory
954489		horiseun	Permutation (APIO22_perm)	C++17	64.63 / 100	12 ms	1628 KiB

perm

#include <iostream>
#include <vector>
#include <algorithm>
#include "perm.h"
using namespace std;

#define ll long long

vector<int> construct_permutation(ll k) {
	vector<ll> pwrs;
	pwrs.push_back((ll) 1);
	for (int i = 0; i < 59; i++) {
		pwrs.push_back(pwrs.back() * 2);	
	}
	vector<int> szs;
	for (int i = pwrs.size() - 1; i >= 0; i--) {
		if (k >= pwrs[i]) {
			szs.push_back(i);
			k -= pwrs[i];
		}
	}
	/*
	for (int i = 0; i < szs.size(); i++) {
		cout << szs[i] << "\n";
	}
	*/
	vector<int> ret;
	int curr = 0;
	for (int i = 0; i < szs.size(); i++) {
		for (int j = curr + szs[i] - 1; j >= curr; j--) {
			ret.push_back(j);
		}
		curr += szs[i];
	}
	for (int i = 0; i < szs.size() - 1; i++) {
		ret.push_back(curr + i);
	}
	reverse(ret.begin(), ret.end());
	/*
	for (int i = 0; i < ret.size(); i++) {
		cout << ret[i] << " ";
	}
	cout << "\n";
	*/
	return ret;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:29:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |  for (int i = 0; i < szs.size(); i++) {
      |                  ~~^~~~~~~~~~~~
perm.cpp:35:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |  for (int i = 0; i < szs.size() - 1; i++) {
      |                  ~~^~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 54.63076923 / 90