Lintcode Medium title: Sort letters by case character sort

Topic

character Case Sort

Given a string containing only letters, sort in the order of uppercase letters followed by lowercase letters.

Have you ever encountered this problem in a real interview? Yes Sample Example

Give "ABACD", one possible answer is "Acbad"

Note

lowercase letters or uppercase letters they do not have to remain relative to each other in the original string.

challenges

Scan it in situ and complete it again.

Solving

This topic is very simple, the first just do a number is greater than the sum of the row in the back, the idea of quick sorting

 Public classSolution {/**      *@paramchars:the Letter Array Your should sort by case *@return: void*/     Public voidSortletters (Char[] chars) {        //Write your code here        intLen =chars.length; if(Len ==0 | | chars==NULL){                    }Else{            intI=0; intJ=len-1;  while(i<=j) {                 while(I<=j && islowercase (chars[i)) i++;  while(I<=j && isuppercase (chars[j)) j--; if(i<=j) {                    CharCH =Chars[i]; Chars[i]=Chars[j]; CHARS[J]=ch; }            }        }            }     Public BooleanIslowercase (Charch) {        if(ch>= ' A ' && ch<= ' z ')            return true; return false; }     Public BooleanIsuppercase (Charch) {        if(ch>= ' A ' && ch<= ' Z ')            return true; return false; }    }

Java Code

Lintcode Medium title: Sort letters by case character sort