[Python 코드카타] 41 ~ 43번 (프로그래머스)

41번 이상한 문자 만들기

def solution(s):
    answer = ''
    a = s.split(' ')
    for i in range(len(a)) :
        for j in range(len(a[i])) :
            if j%2 == 0:
                answer += a[i][j].upper()
            else :
                answer += a[i][j].lower()
        answer += ' '
    return answer[0:-1]

def solution(s):
    sentence =[]
    word =''
    a =s.split(' ')
    for i in range(len(a)):
        for j in range(len(a[i])):
            if j%2==0:
                word += a[i][j].upper()
            else:
                word += a[i][j].lower()
        sentence.append(word)
        word=''
    return " ".join(sentence)

> map, lamda, enumerate, join으로 합치기

def solution(s):
    return " ".join(map(lambda x: "".join([a.lower() if i % 2 else a.upper() for i, a in enumerate(x)]), s.split(" ")))

 

42번 삼총사

def solution(number):
    answer = 0 
    l = len(number)
    for i in range(l):
        for j in range(i+1, l):
            for k in range(j+1, l):
                if number[i] + number[j] + number[k] == 0:
                    answer += 1
    return answe

> 새롭게 안 라이브러리

def solution (number) :
    from itertools import combinations
    cnt = 0
    for i in combinations(number,3) :
        if sum(i) == 0 :
            cnt += 1
    return cnt

 

43번 크기가 작은 부분

def solution(t, p):
    answer = 0
    for i in range(len(t)-len(p)+1):
        if t[i:i+len(p)] <= p :
            answer += 1
        else :
            continue
    return answer