text: Making cumulative frequency
code: for i in range ( 1 , maxx + 1 ) : NEW_LINE INDENT freq [ i ] += freq [ i - 1 ] NEW_LINE DEDENT for i in range ( 1 , maxx + 1 ) : NEW_LINE INDENT if ( freq [ i ] ) : NEW_LINE INDENT value = 0 NEW_LINE DEDENT DEDENT