[Programmers] 코딩 기초 트레이닝 #3

 

목차

 

배열의 길이에 따라 다른 연산하기

https://school.programmers.co.kr/learn/courses/30/lessons/181854

def solution(arr, n):
    LENGTH = len(arr)

    update_index = []

    if LENGTH % 2 != 0:
        for x in range(0, LENGTH):
            if x % 2 == 0:
                update_index.append(x)
    else:
        for x in range(0, LENGTH):
            if x % 2 != 0:
                update_index.append(x)

    for index in update_index:
        arr[index] = arr[index] + n
        
    return arr

 

더 크게 합치기

https://school.programmers.co.kr/learn/courses/30/lessons/181939

def solution(a, b):
    ex1 = int(str(a)+str(b))
    ex2 = int(str(b)+str(a))
    
    return  ex1 if ex1 > ex2 else ex2

 

문자열 곱하기

https://school.programmers.co.kr/learn/courses/30/lessons/181940

def solution(my_string, k):
    return my_string * k

 

n번째 원소부터

https://school.programmers.co.kr/learn/courses/30/lessons/181892

def solution(num_list, n):
    return num_list[n-1::]

 

수 조작하기 1

https://school.programmers.co.kr/learn/courses/30/lessons/181926

def solution(n, control):
    m = {"w": 1,"s": -1,"d": +10,"a": -10}

    for c in control:
        n = n + m[c]

    return n

 

조건에 맞게 수 변환하기

https://school.programmers.co.kr/learn/courses/30/lessons/181835

def solution(arr, k):
    if k % 2 != 0 :
        return [a *k for a in arr] 
    else:
        return [a +k for a in arr]

 

홀짝 구분하기

https://school.programmers.co.kr/learn/courses/30/lessons/181944

a = int(input())

if a % 2 == 0:
    print(a, "is even")
else:
    print(a, "is odd")

 

글자 이어 붙여 만들기

https://school.programmers.co.kr/learn/courses/30/lessons/181915

def solution(my_string, index_list):
    
    answer = ""
    for index in index_list:
        answer += my_string[index]
            
    return answer

 

배열 만들기

https://school.programmers.co.kr/learn/courses/30/lessons/181901

def solution(n, k):
    answer = []
    for x in range(1, n+1):
        if x % k == 0:
            answer.append(x)            
    
    return answer

 

배열의 원소만큼 추가하기

https://school.programmers.co.kr/learn/courses/30/lessons/181861

def solution(arr):
    answer = []
    for a in arr:
        for x in range(0, a):
            answer.append(a)
        
    return answer