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๐Ÿค” PS(Problem Solving)/Leet, ๊ตฌ๋ฆ„

[LeetCode] 905๋ฒˆ - Sort Array By Parity(ํ™€์ง์„ฑ ์—ฌ๋ถ€๋กœ ๋ฐฐ์—ด ์ •๋ ฌ)

2019. 7. 5. 13:01
๋ฐ˜์‘ํ˜•

 ๋ฌธ์ œ


905. Sort Array By Parity
Easy

Given an array A of non-negative integers, return an array consisting of all the even elements of A, followed by all the odd elements of A.

You may return any answer array that satisfies this condition.

 

Example 1:

Input: [3,1,2,4]
Output: [2,4,3,1]
The outputs [4,2,3,1], [2,4,1,3], and [4,2,1,3] would also be accepted.

 

Note:

  1. 1 <= A.length <= 5000
  2. 0 <= A[i] <= 5000


 ํ’€์ด๊ณผ์ •


(1) ๊ทœ์น™


์˜ค๋ฆ„์ฐจ์ˆœ,๋‚ด๋ฆผ์ฐจ์ˆœ ์ƒ๊ด€์—†์ด ์ง์ˆ˜๋ฅผ ์ „๋ถ€ ์•ž์— ๋ฐฐ์น˜ํ•˜๋„๋ก ํ•ฉ๋‹ˆ๋‹ค.

๋‹จ,

1 <= A.length <= 5000

0 <= A[i] <= 5000

์ด๋ผ๋Š” ์กฐ๊ฑด์„ ๊ณ ๋ คํ•˜์—ฌ ์ตœ๋Œ€ํ•œ ์—ฐ์‚ฐํšŸ์ˆ˜๊ฐ€ ์ ๋„๋ก ๊ตฌํ˜„ํ•ฉ๋‹ˆ๋‹ค.


(2) ์ˆœ์„œ


swap()์„ ์ด์šฉํ•˜๊ฑฐ๋‚˜

์ง์ˆ˜๋“ค๋งŒ ๋‹ค๋ฅธ ๋ฒ„ํผ์— ๋„ฃ์€ํ›„, ํ™€์ˆ˜๋งŒ ๋‚จ์€ ์›๋ฐฐ์—ด๊ณผ ํ•ฉํ•ด์„œ ์ถœ๋ ฅํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์‚ฌ์šฉํ•ฉ๋‹ˆ๋‹ค.

๋˜๋Š” for๋ฌธ์„ ๋Œ๋ฉด์„œ ์ƒˆ ๋ฒ„ํผ์— ์ง์ˆ˜๋Š” ๋งจ์•ž, ํ™€์ˆ˜๋Š” ๋งจ๋’ค์—๋‹ค๊ฐ€ ์ถ”๊ฐ€ํ•ด์ค๋‹ˆ๋‹ค.


(3) ์ฝ”๋“œ


C++


#include <iostream>
#include <vector>
using namespace std;
 
vector<int> sortArrayByParity(vector<int>& A) {
    vector<int> answer;
    
    for (vector<int>::iterator it = A.begin();
        it != A.end(); )
    {
        if (*it % 2 == 0)//์ง์ˆ˜
        {
            answer.push_back(*it);
            it = A.erase(it);
        }
        else it++;
    }
    answer.insert(answer.end(), A.begin(), A.end());
    return answer;
}
Colored by Color Scripter
cs


Python


(1) ๋Ÿฐํƒ€์ž„ ์†๋„ ์ œ์ผ ๋น ๋ฆ„

class Solution:
    def sortArrayByParity(self, A):
        odd=[]
        even=[]
        for i in range(len(A)):
            if A[i]%2==0:
                even.append(A[i])
            else:
                odd.append(A[i])
        return even+odd
cs


(2)

class Solution:
    def sortArrayByParity(self, A):
        answer=[]
        for i in range(len(A)):
            if A[i]%2==0:
                answer.insert(0,A[i])
            else:
                answer.append(A[i])
        return answer
cs


(3)

class Solution:
    def sortArrayByParity(self, A):
        answer = collections.deque()
        for i in range(len(A)):
            answer.appendleft(A[i]) if (A[i]%2==0) else answer.append(A[i])
        return answer
Colored by Color Scripter
cs


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