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# Author Problem Lang Verdict Time Memory Sent Judged  
66308207 Practice:
KuzlyaevNikita
1182A - 40 PyPy 3 Accepted 140 ms 8 KB 2019-12-05 13:21:05 2019-12-05 13:21:05
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n=int(input())
print(2**(n//2)*int(n%2==0))
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Time: ? ms, memory: ? KB
Verdict: ?
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