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mym0404/main.py

Created May 24, 2022 09:54
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main.py
N, M = map(int, input().split())
A = set(map(int, input().split()))
B = set(map(int, input().split()))
C = set()
for a in A:
if a not in B:
C.add(a)
for b in B:
if b not in A:
C.add(b)
print(len(C))
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