Given a string “prodevelopertutorial” and number of rows is 3. Print the string formed by concatenating n rows when input string is written in row-wise Zig-Zag fashion. Algorithm for Zigzag Conversion. Number of rows 3 Output: array output should be: "peotrrdvlpruoiloeeta" Visualization of writing elements in zigzag fashion: But if you follow the solution correctly, we are visiting each node only once and are not repeating. A C E G B D F H Now concatenate the two rows and ignore spaces in every row. So we can come to a conclusion to a formula as shown below: The time complexity for this algorithm will be O( n ). Below is algorithm: edit Create an array of size r of string type. Every character has to go to one of the rows. The relation is shown in the below diagram. Many will be confused because we are using 2 for loops the time complexity is O(n^2). If the given number of rows(r) is 1 return string. Write the string in a zigzag pattern. We use cookies to ensure you have the best browsing experience on our website. Initialize row as 0 and down of boolean type. One by one add all characters to different rows. Please use ide.geeksforgeeks.org, generate link and share the link here. code. Interval is the difference between the 2 vertical lines. Traverse from 0 to n-1 and store the characters of a string in string array at index row. Write the string in a zigzag pattern. Please write to us at contribute@geeksforgeeks.org to report any issue with the above content. Example: Input: string = “prodevelopertutorial”. close, link Telegram Channel, My implementation : https://pastebin.com/S7xaxy6N. The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) Given a string and number of rows ‘n’. We strongly recommend that you click here and practice it, before moving on to the solution. brightness_4 Following is the working implementation. The string “PAYPALISHIRING” is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I I G Daily we discuss about competitive programming questions, join us at: Initialize a string s of length n and an integer r representing the number of rows. A step is a difference between the middle element at the vertical line. in JAVABelow is the implementation of the above approach: Thanks to Sakshi Sachdeva for suggesting above solution.Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above. Time Complexity: O(len) where len is length of input string. acknowledge that you have read and understood our, GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Print Concatenation of Zig-Zag String in ‘n’ Rows, Maximum occurring character in an input string | Set-2, Return maximum occurring character in an input string, Remove duplicates from a string in O(1) extra space, Minimum insertions to form a palindrome | DP-28, Minimum number of Appends needed to make a string palindrome, Minimum characters to be added at front to make string palindrome, Rabin-Karp Algorithm for Pattern Searching, Optimized Naive Algorithm for Pattern Searching, Finite Automata algorithm for Pattern Searching, Pattern Searching | Set 6 (Efficient Construction of Finite Automata), Boyer Moore Algorithm for Pattern Searching, Boyer Moore Algorithm | Good Suffix heuristic, Aho-Corasick Algorithm for Pattern Searching, Z algorithm (Linear time pattern searching Algorithm), Check if a string is substring of another, Given two strings, find if first string is a subsequence of second, Find number of times a string occurs as a subsequence in given string, Write a program to reverse an array or string, Write a program to print all permutations of a given string, Check for Balanced Brackets in an expression (well-formedness) using Stack, Different methods to reverse a string in C/C++. Print the string formed by concatenating n rows when input string is written in row-wise Zig-Zag fashion.Examples: The idea is to traverse the input string. Auxiliary Space: O(len)Thanks to Gaurav Ahirwar for suggesting above solution. Given a string “prodevelopertutorial” and number of rows is 3. The string “PAYPALISHIRING” is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I I G Y I R And then read line by line: "PAHNAPLSIIGYIR" By using our site, you Don’t stop learning now. Attention reader! Writing code in comment? Examples: Input: str = "ABCDEFGH" n = 2 Output: "ACEGBDFH" Explanation: Let us write input string in Zig-Zag fashion in 2 rows. Experience. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.   Visualization of writing elements in zigzag fashion: Visualization of writing output in the array: The zigzag pattern of the array elements by taking the index will be like: We can solve this with the help of “interval” and “step”.

zigzag pattern string

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zigzag pattern string 2020