316. Remove Duplicate Letters | Day 015 | Stack

[@udittiwari8240]

Such a nice explanation

[@allpeace1]

nice explanation understood

[@shalinijha7359]

where do we get that list of question from which you are using?

[@jhanavikumari274]

best explanation for this question thank youuu

[@rohitreddy1340]

Nice

[@Rohitsingh-ep2lo]

Done

[@niteshkhanna690]

Please post these type of question daily which are very important it would be great

[@kishokkumars7602]

First like and First comment

[@ARYANMITTAL]

Kishok kumar ji dhanyawad 🤌🏻🫡

[@kishokkumars7602]

@@ARYANMITTAL 😁😁

[@snehaloganathan939]

Hi aryan please share those question excel sheet

[@dayashankarlakhotia4943]

public String removeDuplicateLetters(String s){ StringBuilder sb=new StringBuilder(); int[]cnt=new int[128]; boolean[]vis=new boolean[128]; for(char c:s.toCharArray()) ++cnt[c]; for(char c:s.toCharArray()){ --cnt[c]; if(vis[c]) continue; while(sb.length()>0&&last(sb)>c&&cnt[last(sb)]>0){ vis[last(sb)]=false; sb.setLength(sb.length()-1); } vis[c]=true; sb.append(c); } return sb.toString(); } private char(StringBuilder sb){ return sb.charAt(sb.length()-1); } } 🎉❤ beats 100%tc