text: Map is used to store element frequencies
code: m = dict ( ) NEW_LINE for i in range ( n ) : NEW_LINE INDENT if arr [ i ] in m . keys ( ) : NEW_LINE INDENT m [ arr [ i ] ] += 1 NEW_LINE DEDENT else : NEW_LINE INDENT m [ arr [ i ] ] = 1 NEW_LINE DEDENT DEDENT Sum = 0 NEW_LINE