https://school.programmers.co.kr/learn/courses/30/lessons/12930
python
def solution(s):
idx = -1
answer = []
for c in s:
if c == " ":
idx = -1
else:
idx += 1
c = c.upper() if idx % 2 == 0 else c.lower()
answer.append(c)
return "".join(answer)
if __name__ == "__main__":
result = solution("try hello world")
print(result)
TrY HeLlO WoRlD