Using a Robot to Print the Lexicographically Smallest String - Practice Coding | SlaveCode
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2434. Using a Robot to Print the Lexicographically Smallest String
Medium
30 Points
Hash Table
String
Stack
Greedy
You are given a string s and a robot that currently holds an empty string t. Apply one of the following operations until s and t are both empty:
Return the lexicographically smallest string that can be written on the paper.
Examples
Example 1
Input: s = "zza"
Output: "azz"
Explanation: Let p denote the written string.
Initially p="", s="zza", t="".
Perform first operation three times p="", s="", t="zza".
Perform second operation three times p="azz", s="", t="".
Example 2
Input: s = "bac"
Output: "abc"
Explanation: Let p denote the written string.
Perform first operation twice p="", s="c", t="ba".
Perform second operation twice p="ab", s="c", t="".
Perform first operation p="ab", s="", t="c".
Perform second operation p="abc", s="", t="".
Example 3
Input: s = "bdda"
Output: "addb"
Explanation: Let p denote the written string.
Initially p="", s="bdda", t="".
Perform first operation four times p="", s="", t="bdda".
Perform second operation four times p="addb", s="", t="".
Constraints
1 <= s.length <= 105
s consists of only English lowercase letters.
2434. Using a Robot to Print the Lexicographically Smallest String
Medium
30 Points
Hash Table
String
Stack
Greedy
You are given a string s and a robot that currently holds an empty string t. Apply one of the following operations until s and t are both empty:
Return the lexicographically smallest string that can be written on the paper.
Examples
Example 1
Input: s = "zza"
Output: "azz"
Explanation: Let p denote the written string.
Initially p="", s="zza", t="".
Perform first operation three times p="", s="", t="zza".
Perform second operation three times p="azz", s="", t="".
Example 2
Input: s = "bac"
Output: "abc"
Explanation: Let p denote the written string.
Perform first operation twice p="", s="c", t="ba".
Perform second operation twice p="ab", s="c", t="".
Perform first operation p="ab", s="", t="c".
Perform second operation p="abc", s="", t="".
Example 3
Input: s = "bdda"
Output: "addb"
Explanation: Let p denote the written string.
Initially p="", s="bdda", t="".
Perform first operation four times p="", s="", t="bdda".
Perform second operation four times p="addb", s="", t="".