Given a string obtain the alphabetically smallest string possible by swapping. You are given a binary string of length n (i.

Given a string obtain the alphabetically smallest string possible by swapping Can you solve this real interview question? Minimum Number of Moves to Make Palindrome - You are given a string s consisting only of lowercase English letters. Lexicographically Smallest Palindrome - You are given a string s consisting of lowercase English letters, and you are allowed to perform operations on it. May 12, 2025 · Given a string s and an integer k, the task is to find the maximum possible number by performing swap operations on the digits of s at most k times. Method 1: Greedy You are given a string s, and an array of pairs of indices in the string pairs where pairs[i] = [a, b] indicates 2 indices (0-indexed) of the string. Pair “i, j” means that you can swap the ith and jth characters in the string any number of times. Apr 4, 2025 · Given a string s, the task is to find the lexicographically smallest string that can be formed by removing at most one character from the given string. Mar 21, 2023 · Given a string str containing only characters 0, 1, and 2, you can swap any two adjacent (consecutive) characters 0 and 1 or any two adjacent (consecutive) characters 1 and 2. If the new string comes earlier alphabetically, replace the current smallest string with the new string. You are given a binary string of length n (i. declare an answer string as blank. What is the lexicographically minimum possible string you can obtain from the given one if you can perform no more than k moves? It is possible that you do not perform any moves at all. Return the lexicographically smallest string with length equal to n and numeric value equal to k. In one operation, you can replace a character in s with another lowercase English letter. Examples: Input: Str = zcxfbe Pairs = (0, 1), (0 Your goal is to find the lexicographically smallest string possible after performing these swaps For example, if you have the string "dcab" and pairs [[0,3],[1,2]], you can: Dec 30, 2015 · The smallest lexicographical order is an order relation where string s is smaller than t, given the first character of s (s1) is smaller than the first character of t (t1), or in case they are equivalent, the second character, etc. Your task is to make s a palindrome with the minimum number of operations possible. . Digits have the same parity if both are odd or both are even. Jul 23, 2020 · ⦁ Replace and/or re-arrange characters of this given string to get the lexicographically smallest string possible. This new word must meet two criteria: It must be greater than the original word It must be the smallest word that meets the first condition For example, given the word w=abcd, the next largest word is . Jul 23, 2025 · Suppose you are given a string Str of length N and a set of Pairs ( i, j such that 0 <= i < j < N, 0 based indexing). The numeric value of a string consisting of lowercase characters is defined as the sum of its characters' numeric values. A string a is lexicographically smaller than string b (of the same length) if in the first position where a and b differ, string a has a letter that appears earlier in the alphabet than the corresponding letter in b. e. So aaabbb is smaller than aaac because although the first three characters are equal, the fourth character b is smaller than the fourth character c. 4 Jul 23, 2025 · Given a binary string s of length N, the task is to find the lexicographically smallest string using infinite number of swaps between 0's and 1's. Return the lexicographically smallest string you can obtain by applying the above operations any number of times on s. For instance, if the input string is “acb”, one swap of ‘b’ and ‘c’ would yield the desired output “abc”, which is the smallest possible string in lexicographical order that can be achieved with a single swap. Return the lexicographically smallest equivalent string of baseStr by using the equivalency information from s1 and s2. Smallest String With Swaps - Leetcode Solution Problem Description Given a string s and an array of pairs pairs where each pair [a, b] indicates that you can swap the characters at indices a and b in s as many times as you like, return the lexicographically smallest string that can be obtained after any number of swaps. A string x is lexicographically smaller than a string y of the same length if x[i] comes before y[i] in alphabetic order for the first position i such that x[i] != y[i]. Can you solve this real interview question? Lexicographically Smallest String After a Swap - Given a string s containing only digits, return the lexicographically smallest string that can be obtained after swapping adjacent digits in s with the same parity at most once. Note that the input will be generated such that s can always be converted to a palindrome Jul 23, 2025 · Given a string S consisting of lowercase alphabets, the task is to find the lexicographically smallest string that can be obtained by removing duplicates from the given string S. Microsoft Online Assessment (OA) - Lexicographically Smallest String Given a string str, the task is to find the lexicographically smallest string that can be formed by removing at most one character from the given string. If no such character pair is found in the previous string then print the given string as it is the smallest string possible. Mar 4, 2024 · Problem Formulation: Given a string, the challenge is to find the lexicographically smallest string possible after applying a series of operations. For example, the numeric value of the string "abe" is equal to 1 + 2 + 5 = 8. A substring is a contiguous sequence of characters in a string. For cbacdcbc Mar 16, 2019 · You are given a string s, and an array of pairs of indices in the string pairs where pairs[i] = [a, b] indicates 2 indices (0-indexed) of the string. Jan 11, 2024 · To find the alphabetically smallest string that can be obtained from a given string, you can sort the characters in the string in ascending order using an array and the sorted () method. Mar 15, 2019 · Given a string, find the palindrome that can be made by inserting the fewest number of characters as possible anywhere in the word. The task is to obtain the minimum possible (lexicographically) string by using these swaps an arbitrary number of times. 2. Compare this new string to our current smallest string. If the given string cannot be converted to a lexicographically smallest non-palindromic string, then print “ -1”. Examples: Input: str = "100210" Output: 001120 We can swap 0 and 1 OR we can swap 1 and 2. Example 1: Problem Description You are given a string s consisting of lowercase English letters. Examples: Input: s = "1001001" Output: 0000111 Explanation: Lexicographically smallest string of 1001001 is only 0000111 Input: s = "0001" Output: 0001 Explanation: Lexicographically smallest string of 0001 is only 0001 Input: s = "1" Output: 1 Jan 7, 2024 · For example: This method ensures that all characters in the output string are arranged in the correct alphabetical order, thus giving you the smallest possible string based on alphabetical sorting. For this, you can perform the following two operations any number of times. iterate through i=0 till n: *update answer to answer+arr [i]. The operation allows you to: Select any non-empty substring from s Replace every letter in that substring with the preceding letter in the English alphabet For example: 'b' becomes 'a', 'c' becomes 'b', and so on Aug 13, 2025 · A lexicographically smallest string is the one that comes first in alphabetical order among all possible strings, determined by comparing characters at each position until the first differing character, with the smallest character winning the comparison. Can you solve this real interview question? Smallest String With Swaps - You are given a string s, and an array of pairs of indices in the string pairs where pairs [i] = [a, b] indicates 2 indices (0-indexed) of the string. These operations could include character replacements, rotations, or any other manipulations that affect the string ordering. Jul 15, 2025 · Given string str consisting of lowercase alphabets, the task is to construct the lexicographically smallest non-palindromic string by swapping any pair of adjacent characters from the string any number of times. Can you solve this real interview question? Smallest String With Swaps - You are given a string s, and an array of pairs of indices in the string pairs where pairs[i] = [a, b] indicates 2 indices(0-indexed) of the string. Jul 23, 2025 · Given a stringS and a character C, the task is to place a character in the string in such a way that the string obtained is the lexicographically smallest string. Approach The brute force approach to finding the smallest string with swaps involves trying every single possible combination of swaps. Examples: Input: s = "7599", k = 2 Output: 9975 Explanation: Two Swaps can make input 7599 to 9975. 1202. Examples: Input: S = "yzxyz" Output: xyz Explanation: Removing the duplicate characters at indices 0 and 1 in the given string, the remaining string "xyz" consists only of unique alphabets only and is the smallest Oct 23, 2021 · The task is to find the lexicographically smallest string possible by inserting a given character. If there is more than one palindrome of minimum length that can be made, return the lexicographically earliest one (the first one alphabetically). Repeat steps 2-4 for every possible pair of positions where swaps are allowed. Sep 18, 2023 · Return the lexicographically smallest string you can obtain after performing the above operation exactly once. For example, both 5 and 9 are odd, and 2 and 4 are even, thus having the same parity. Input: s = "aaa" Output: "aa" Approach: Traverse the string and delete the i-th character at the Mar 10, 2024 · Problem Formulation: We aim to find a method to create the lexicographically smallest string by making only one swap of characters in a given string. You need to perform exactly one operation on this string to make it lexicographically smallest. a string consisting of n characters '0' and '1'). A string a is lexicographically smaller than a string b (of the same length) if in the first position where a and b differ, string a has a letter that appears earlier in the alphabet than the corresponding letter in b. As an assignment, students at HackerLand High School have to find out the lexicographically smallest possible string after performing certain operations on a string. You have to output the lexicographically smallest string that can be produced by doing any number of swaps on the input string. First swap 9 with 5 so number becomes 7995, then swap 9 with 7 so number becomes 9975 Input: s = "1234567", k = 4 Output: 7654321 Explanation Given a string s containing only digits, the task is to return the lexicographically smallest string that can be obtained after swapping adjacent digits in s with the same parity at most once. We generate each possible string arrangement and check if it's smaller than our current smallest string. 3. Jul 12, 2025 · So, start traversing the string from the left and for every character, find the smallest character (even smaller than the current character) that appears after swapping all of their occurrences to get the required string. Steps to solve this problem: 1. Example 1: Input: abczd Output: abcd Example 2: Input: abcda Output: abca Explanation: One can remove d to get abca, which is the lexicographically smallest string possible Given a string s that consists of lowercase English letters, select exactly one non-empty substring of s and replace each character of it with the previous character of the English alphabet. Return the lexicographically smallest string that s can be changed to after using the swaps. After computing the sorted string, find the first unmatched character from the given string and replace it with the last occurrence of the unmatched character in the sorted string. This is like trying every key on a keyring until you find the one that opens the lock. sort the string a from start index to end index. In one move you can swap two adjacent characters of the string. For instance, using the function solution ('banana') would return 'aaabnn' as the output, showing how the function sorts the characters. Example 1: Feb 18, 2022 · Given a string obtain the alphabetically smallest string possible by swapping either adjacent 'a' and 'b' characters or adjacent 'b' and 'c' character any number of times . You are given two integers n and k. You are given a string s, and an array of pairs of indices in the string pairs where pairs[i] = [a, b] indicates 2 indices (0-indexed) of the string. Return the lexicographically smallest string that s can be changed to after using Jan 16, 2021 · Given a word, create a new word by swapping some or all of its characters. Return the minimum number of moves needed to make s a palindrome. You can swap the characters at any pair of indices in the given pairs any number of times. Question: Write a java function that, given a string S consisting of N characters returns the alphabetically smallest string that can be obtained by removing exactly ine letter from SGiven S=acb by remving one letter you can obtain 'ac", "ab" or "cb" Swap the letters in those positions and create a new string. In one move, you can select any two adjacent characters of s and swap them. Jul 12, 2025 · Input: str = "zyxw"Output: wyxz Approach: The idea is to use sorting and compute the smallest lexicographical string possible for the given string. Return the lexicographically smallest string that s can be changed to after using Jul 30, 2024 · By Nango Kala 30 July 2024 0 0 Given string str consisting of lowercase alphabets, the task is to construct the lexicographically smallest non-palindromic string by swapping any pair of adjacent characters from the string any number of times. Example 1: Feb 1, 2023 · This approach works because we want the concatenated string to be lexicographically small, not the individual strings to be in the lexicographical order. For example, given the equivalency information from s1 = "abc" and s2 = "cde", "acd" and "aab" are equivalent strings of baseStr = "eed", and "aab" is the lexicographically smallest equivalent string of baseStr. Examples: Input: s = "abcda" Output: "abca" Explanation: One can remove 'd' to get "abca" which is the lexicographically smallest string possible. Swapping Can you solve this real interview question? Smallest String With Swaps - You are given a string s, and an array of pairs of indices in the string pairs where pairs [i] = [a, b] indicates 2 indices (0-indexed) of the string. 3p cspim pbor74 m0 uohb z1mrvs9 zyv ugrvm k49 gkit