Submission #740876

#	Time	Username	Problem	Language	Result	Execution time	Memory
740876		enerelt14	Permutation (APIO22_perm)	C++17	0 / 100	1 ms	212 KiB

perm

#include "perm.h"
#include<bits/stdc++.h>
#define ll long long
#define pb push_back
using namespace std;
vector<int> x;
int n;
vector<int> construct_permutation(ll k){
	if (k == 1)return {};
	if (k == 2)return {0};
	if (k == 3)return {1, 0};
	if (k % 4 == 0){
		x = construct_permutation(k / 4);
		n = x.size();
		x.pb(n);
		x.pb(n + 1);
		return x;
	}
	if (k % 4 == 1){
		x = construct_permutation(k / 4);
		n = x.size();
		for (int i = 0; i < n; i++)x[i]++;
		x.pb(n + 1);
		x.pb(n + 2);
		x.pb(0);
		return x;
	}
	if (k % 4 == 2){
		x = construct_permutation(k / 4);
		n = x.size();
		for (int i = 0; i < n; i++)x[i]++;
		x.pb(n + 1);
		x.pb(0);
		x.pb(n + 2);
		return x;
	}
	x = construct_permutation(k / 4);
	n = x.size();
	for (int i = 0; i < x.size(); i++)x[i] += 2;
	x.pb(1);
	x.pb(n + 2);
	x.pb(0);
	x.pb(n + 3);
	return x;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:39:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |  for (int i = 0; i < x.size(); i++)x[i] += 2;
      |                  ~~^~~~~~~~~~

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