Submission #744689

#	Time	Username	Problem	Language	Result	Execution time	Memory
744689		josanneo22	Permutation (APIO22_perm)	C++17	91.33 / 100	2 ms	340 KiB

perm

#include <bits/stdc++.h>
#include<unordered_map>
#include<unordered_set>
#include<algorithm>
using namespace std;

#define mp make_pair
#define pb push_back
#define pii pair<int,int>
#define fi first
#define se second 

#include <vector>
std::vector<int> construct_permutation(long long k);
std::vector<int> construct_permutation(long long k)
{
	int bt = 0;
	while ((1LL<<bt) <= k) bt++;
	bt--;
	std::vector<int> a(bt, -1);
	for (int i = bt - 1; i >= 0;i--) {
		if ((1LL << i) & k) {
			a[i] = bt++;
		}
	}
	std::vector<int> ans;
	for (int i = 0; i < a.size(); i++) {
		if(a[i]!=-1) ans.push_back(a[i]);
		ans.push_back(i);
	}
	return ans;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:27:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |  for (int i = 0; i < a.size(); i++) {
      |                  ~~^~~~~~~~~~

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