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PR Summary
폰켓몬
set으로 한줄풀이 가능하지만 착실하게 해시로 풀었습니다
해시에 없으면 1, 있으면 value+1 해서(사실 +1 안해도 됨) 마지막에 해시 길이로 구했어요
올바른 괄호
학교에서 배운듯한 문제
'('만 스택에 쌓고 괄호는 짝이 맞아야 하기에 문자열 끝나기 전에 스택이 비어버리면 안됨
문자열 끝나고 스택에 괄호가 남아있어도 안됨
그냥 카운트해도 될듯
같은 숫자는 싫어
스택
ISSUE NUMBER