Submission #980399

#	Time	Username	Problem	Language	Result	Execution time	Memory
980399		willychan	Permutation (APIO22_perm)	C++17	10 / 100	109 ms	262144 KiB

perm

#include "perm.h" 
using namespace std;
std::vector<int> construct_permutation(long long k)
{
	vector<int> s;			
	int sum = 0;
	k--;
	for(int f=18;f>=2;f--){
		if((1LL<<f)-1<=k){
			s.push_back(f);
			k-=((1<<f)-1);
			sum+=f;
		}
	}
	sum+=k;
	for(int i=0;i<k;i++) s.push_back(1);
	vector<int> ans;	
	for(auto l : s){
		for(int i=sum-l+1;i<=sum;i++) ans.push_back(i-1);
		sum-=l;
	}
	return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 90