text: Traverse through the all possible elements
code: for i in range ( 1 , maxi + 1 ) : NEW_LINE INDENT if ( mobius [ i ] == 0 ) : NEW_LINE INDENT continue NEW_LINE DEDENT temp = 0 NEW_LINE for j in range ( i , maxi + 1 , i ) : NEW_LINE INDENT temp += fre [ j ] NEW_LINE DEDENT ans += temp * ( temp - 1 ) // 2 * mobius [ i ] NEW_LINE DEDENT