text: stores the prefix sum of number of primes less than or equal to 'i
code: ' NEW_LINE INDENT for i in range ( 1 , MAX + 1 ) : NEW_LINE INDENT if ( prime [ i ] == True ) : NEW_LINE INDENT sum [ i ] = 1 NEW_LINE DEDENT sum [ i ] += sum [ i - 1 ] NEW_LINE DEDENT DEDENT