Submission #702136

#	Time	Username	Problem	Language	Result	Execution time	Memory
702136		ld_minh4354	Permutation (APIO22_perm)	C++17	10 / 100	1 ms	340 KiB

perm

#include "perm.h"
using namespace std;

vector<int> construct_permutation(long long k)
{
	int a[5005],i,j,cur_val,pos,cur_k,n;
	
	cur_k=k;
	
	n=1;a[1]=0;cur_val=2;
	while (cur_val*2<=k)
	{
		n++;a[n]=n-1;
		cur_val*=2;
	}
	cur_k -= cur_val;
	
	while (cur_k > 0)
	{
		cur_val=1;pos=1;
		while (cur_val*2 <= cur_k)
		{
			pos++;cur_val*=2;
		}
		
		for (i=n+1;i>pos;i--) a[i]=a[i-1];
		n++;a[pos]=n-1;
		
		cur_k -= cur_val;
	}
	
	vector<int> ans;
	for (i=1;i<n+1;i++) ans.push_back(a[i]);
	return ans;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:6:16: warning: unused variable 'j' [-Wunused-variable]
    6 |  int a[5005],i,j,cur_val,pos,cur_k,n;
      |                ^

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