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# 풀이 참고 | ||
def solution(n, lost, reserve): | ||
# 여벌교복 가져온 학생도 도난 당할 수 있어서 중복삭제 | ||
reserveSet = set(reserve) - set(lost) | ||
lostSet = set(lost) - set(reserve) | ||
|
||
for i in reserveSet: | ||
if i - 1 in lostSet: | ||
lostSet.remove(i - 1) | ||
elif i + 1 in lostSet: | ||
lostSet.remove(i + 1) | ||
return n - len(lostSet) |