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| // @Title: 构造限制重复的字符串 (Construct String With Repeat Limit)
// @Author: 15816537946@163.com
// @Date: 2022-02-20 13:38:03
// @Runtime: 30 ms
// @Memory: 42.3 MB
class Solution {
public String repeatLimitedString(String s, int repeatLimit) {
int count[]=new int[26];
for(int i=0;i<s.length();i++){count[s.charAt(i)-'a']++;}
StringBuilder ans=new StringBuilder();
int c=0;
int i=25;
while(true){
while(i>=0&&count[i]==0){i--;}
if(i==-1){break;}
while(count[i]>0&&c<repeatLimit){
c++;
ans.append((char)(i+'a'));
count[i]--;
}
c=0;
if(count[i]==0){continue;}
else{
int j=i-1;
while(j>=0&&count[j]==0){j--;}
if(j>=0){
ans.append((char)(j+'a'));
count[j]--;
}
else{break;}
}
}
return ans.toString();
}
}
|