Submission #978972

#	Time	Username	Problem	Language	Result	Execution time	Memory
978972		rshohruh	Permutation (APIO22_perm)	C++17	91.33 / 100	2 ms	600 KiB

perm

#include "perm.h"

#include <bits/stdc++.h>
using namespace std;
#define ll long long
std::vector<int> construct_permutation(long long k)
{
	k--;
	vector<int> a;
	int cur = 0;
	while((1ll<<a.size())-1 <= k) a.push_back(cur++);
	a.pop_back(); --cur;
	k -= (1ll<<a.size())-1;
	int i = a.size()-1;
	for(int i = a.size()-1; i >= 0; --i){
		if((1ll<<i) <= k){
			a.insert(a.begin()+i, cur++);
			k -= (1ll<<i);
		}
	}
	return a;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:14:6: warning: unused variable 'i' [-Wunused-variable]
   14 |  int i = a.size()-1;
      |      ^

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