Store all array elements in a hash table
S = set ( A ) NEW_LINE maxLen = 0 NEW_LINE for i in range ( 0 , n ) : NEW_LINE INDENT for j in range ( i + 1 , n ) : NEW_LINE INDENT x = A [ j ] NEW_LINE y = A [ i ] + A [ j ] NEW_LINE length = 2 NEW_LINE DEDENT DEDENT