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k=int(input ())
s=list(map(int, input() .split()))
s1=set()
s2=set()
for i in s:
if i in s1:
s2. add (i)
else:
s1. add (i)
result=s1-s2
print (*result)
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The Captain's Room
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here's my code:
k=int(input ()) s=list(map(int, input() .split())) s1=set() s2=set() for i in s: if i in s1: s2. add (i) else: s1. add (i) result=s1-s2 print (*result)