Потеха Кузи
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| Language | Python |
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| Snippet Metadata | |
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| Owner | vovapskov |
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| Modified | |
| Visibility | Public |
a = list(map(int, input().split()))
temp = set()
for x in a:
if x not in temp:
temp.add(x)
print("NO")
else:
print("YES")
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