Submission #3197627

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Source Code Expand

from collections import Counter
n = int(input())
a = Counter(map(int, input().split()))
ans = 0
b = [k for k, v in sorted(a.items()) if v >= 2]
for k, v in sorted(a.items(), reverse=True):
    if v >= 4:
        ans = max(ans, k * k)
if len(b) >= 2:
    ans = max(ans, b[-1] * b[-2])
print(ans)

Submission Info

Judge Result