백준 30700 KOREA 문자열 만들기

https://www.acmicpc.net/problem/30700

30700번: KOREA 문자열 만들기

 

def solution(s):
    korea = ['K','O',"R",'E',"A"]
    current, answer = 0, 0
    for i in s:
        if i == korea[current]:
            answer += 1
            current = (current + 1) % 5
    return answer
 
if __name__ == '__main__':
 
    s = input()
 
    print(solution(s))