Submission #972133

#	Time	Username	Problem	Language	Result	Execution time	Memory
972133		tamir1	Permutation (APIO22_perm)	C++17	71.22 / 100	10 ms	1116 KiB

perm

#include "perm.h"
#include <iostream>
#define ll long long
using namespace std;
vector<int> construct_permutation(long long k)
{
	ll t=0,i,j,sum=0,idx=0;
	k--;
	vector<ll> v,u;
	while(true){
		if(t>k) break;
		v.push_back(t);
		t=t*2+1;
	}
	while(k>0){
		for(i=v.size()-1;i>=0;i--){
			if(v[i]<=k){
				u.push_back(i);
				k-=v[i];
				break;
			}
		}
	}
	for(i=0;i<u.size();i++) sum+=u[i];
	vector<int> ans(sum);
	for(i=u.size()-1;i>=0;i--){
		for(j=sum-u[i];j<sum;j++){
			ans[j]=idx;
			idx++;
		}
		sum-=u[i];
	}
	return ans;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:24:11: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |  for(i=0;i<u.size();i++) sum+=u[i];
      |          ~^~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 61.215384618 / 90