from random import randint
A = [randint(1, 10000) for i in range(1000)]
Max  = -10**9
for i in range(len(A)):
    for j in range(i + 1, len(A)):
        if (A[i] * A[j]) % 350 == 0 and A[i] > A[j]:
            Max = max(Max, A[i] * A[j])
print(Max)