Lintcode-medium-sort Letters by case

Source: Internet
Author: User
Tags lintcode

Given a string which contains only letters. Sort it by lower case first and upper case second.

Notice

It ' s not necessary to keep the original order of lower-case letters and upper case letters.

Example

"abAcD"for, a reasonable answer is"acbAD"

Challenge

Do it in One-pass and In-place.

 Public classSolution {/**      *@paramchars:the Letter Array Your should sort by case *@return: void*/     Public voidSortletters (Char[] chars) {        //Write your code here                if(Chars = =NULL|| Chars.length = = 0)            return; intleft = 0; intright = Chars.length-1;  while(Left <Right ) {             while(Left < right && Chars[left] >= ' A ' && chars[left] <= ' z ') Left++;  while(Left < right && Chars[right] >= ' A ' && chars[right] <= ' Z ') Right--; if(Left <Right ) swaps (chars, left, right); }                return; }         Public voidSwapChar[] chars,intIintj) {        Chartemp =Chars[i]; Chars[i]=Chars[j]; CHARS[J]=temp; return; }}

Lintcode-medium-sort Letters by case

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