2020 09 fwqulq java find consecutive characters in string

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Code Review Stack Exchange is a question and answer site for peer programmer code reviews.

Get more...

It only takes a minute to sign up. Is there any way to make this code easier for me to write, or make the code more efficient? Any feedback would be most welcome! I tried testing with 3! I also tried 1, 2, 9, and 1, 0, 1. All cases seem to work. That's a lot of cases to enumerate. You're basically doing all of the comparisons that a sorting algorithm would do, but you've "unrolled" the loop. If you don't want to construct an array and sort it, then you could try this: check that the minimum and maximum differ by 2, and that all three numbers are distinct.

The problem that I have with writing something like the original code is that it is complicated to be sure that it does the right thing in every situation. You've taken three values and perform whopping fifteen comparisons on them. What if you'd missed one? The code would almost work, except it would occasionally in that one situation return the wrong result.

Sorting saves a lot of logic here. Since we know the order, we can just check the differences directly. If any adjacent numbers are not consecutive, we can return false. If it makes it all the way through, they all must be consecutive. Note that this also handles other than three numbers. For example, it always returns true if there's zero or one number passed. This may or may not be what you want. Now we do five manual comparisons including the comparison of i to numbers.

The sort does more comparisons, but we don't have to worry if we got those correctly. The chances of there being an error in sort that made it through the Java compiler's testing is extremely low. I find this version much easier to read and verify correctness than the original code.

For most cases, the difference in runtime is going to be minimal and unimportant. My ability to write code that looks like this quickly and be sure it works is usually going to be more important. Agreed, sorting is easiest to simplify the code. Your code is properly formatted except for one superfluous spacehowever, the lengthy expression.

I try an advice for the case that no such solution is available.Remove 3 or more consecutive characters from a string, repeat until there are no more. Hi there, There are couple of solutions for this problem. This implementation may be a bit slower than just working on string actually in the end big O is the samebut it is much more elegant - you don't need to write that many temp variables and conditions.

Maximize cost of deletions to obtain string having no pair of similar adjacent characters

Push stackOfChars. Pop ; if tempStackOfChars. Empty; while tempStackOfChars. WriteLine outputString ; Console. Push fromStack. Pop ; while stack. Seems pretty optimal. CareerCup's interview videos give you a real-life look at technical interviews. In these unscripted videos, watch how other candidates handle tough questions and how the interviewer thinks about their performance. Most engineers make critical mistakes on their resumes -- we can fix your resume with our custom resume review service.

And, we use fellow engineers as our resume reviewers, so you can be sure that we "get" what you're saying. Our Mock Interviews will be conducted "in character" just like a real interview, and can focus on whatever topics you want. All our interviewers have worked for Microsoft, Google or Amazon, you know you'll get a true-to-life experience.

Comment hidden because of low score. Click to expand. August 15, Flag Reply. Add a Comment Add a Comment. Writing Code?

Consecutive Frequency Of A character in A String - Solved In JAVA -any doubts post the comments

Add Question. CareerCup is the world's biggest and best source for software engineering interview preparation. See all our resources. Open Chat in New Window. What's Going On. Report a Bug or Issue. Books is a comprehensive book on getting a job at a top tech company, while focuses on dev interviews and does this for PMs. Learn More. Videos CareerCup's interview videos give you a real-life look at technical interviews.

Resume Review Most engineers make critical mistakes on their resumes -- we can fix your resume with our custom resume review service. Mock Interviews Our Mock Interviews will be conducted "in character" just like a real interview, and can focus on whatever topics you want.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. It is asked in an interview to write the code in Java to display the string which doesn't have consecutive repeated characters. I wrote code to find continues repeating char. Is there any algorithm or efficient way to find it? Learn more. Check a string for consecutive repeated characters [closed] Ask Question.

Asked 6 years, 3 months ago. Active 6 years, 3 months ago. Viewed 17k times. Kevin Panko 7, 9 9 gold badges 46 46 silver badges 57 57 bronze badges. Venki Venki 66 1 1 gold badge 2 2 silver badges 6 6 bronze badges.

If you already wrote the code, try posting it over at Code Review if you want people to look at it. What does "continues repeated character" mean? Store the String characters in a List and then Match for successive repeatitions! DonBranson I think he means oo in Googlepp in Apple and so on. Active Oldest Votes. Break the loop. Choose the next string. If you have reached till the end of the string with no match having continuous repeated character, then print the string. Jerky Jerky 2, 2 2 gold badges 18 18 silver badges 29 29 bronze badges.

Corrected the code. It would make the code a lot clearer without all the manual mucking around with arrays. The Overflow Blog. Podcast Ben answers his first question on Stack Overflow. The Overflow Bugs vs. Featured on Meta.

Responding to the Lavender Letter and commitments moving forward. Linked 1.Note : We do not need to consider overall count, but the count of repeating that appear at one place. The Simple solution of this problem is to use two for loops. The outer loop considers current character, the inner loop counts occurrences of current character.

If the count goes beyond current maximum count, we update the result. An efficient solution is to run only one loop. The idea is to reset the count as 1 as soon as we find a character not matching with previous.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute. See your article appearing on the GeeksforGeeks main page and help other Geeks. Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

Attention reader! Writing code in comment? Please use ide. Given a string, the task is to find maximum consecutive repeating character in string. Python 3 program to find the.

Find the maximum repeating. Update result if required. Write maxRepeating str. Returns the maximum repeating. Traverse string except. If current character. If doesn't match, update result. This code is contributed. Load Comments. We use cookies to ensure you have the best browsing experience on our website.Given a string strfind the length of the longest substring without repeating characters. Method 1 Simple : O n 3 : We can consider all substrings one by one and check for each substring whether it contains all unique characters or not.

Whether a substring contains all unique characters or not can be checked in linear time by scanning it from left to right and keeping a map of visited characters. Method 2 Better : O n 2 The idea is to use window sliding. Whenever we see repitition, we remove the pervious occurrance and slide the window.

Method 3 Linear Time : Let us talk about the linear time solution now. This solution uses extra space to store the last indexes of already visited characters.

The idea is to scan the string from left to right, keep track of the maximum length Non-Repeating Character Substring seen so far in res. When we traverse the string, to know the length of current window we need two indexes.

To check if the current character was present in the previous window or not, we store last index of every character in an array lasIndex[]. Else we keep same i. For example, if string consists of lowercase English characters then value of d is Auxiliary Space: O d. As an exercise, try the modified version of the above problem where you need to print the maximum length NRCS also the above program only prints the length of it.

Remove Consecutive Duplicates in Python

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above. Attention reader!

Writing code in comment? Please use ide. How to swap two numbers without using a temporary variable? Python3 program to find the length. This functionr eturns true if all.Given string str of length Nthe task is to check if the given string contains only special characters or not. Therefore, the output is Yes. Therefore, the output is No.

Naive Approach: Iterate over the string and check if the string contains only special characters or not. Follow the steps below to solve the problem:.

Follow the steps below:. Attention reader! If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute. See your article appearing on the GeeksforGeeks main page and help other Geeks. Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below. Writing code in comment? Please use ide. Maximise sum of absolute difference between adjacent elements in Array with sum K Maximum sum of difference of adjacent elements Minimum absolute difference between N and a power of 2 Minimize count of given operations required to make two given strings permutations of each other Check if a string consists only of special characters Check if a string contains uppercase, lowercase, special characters and numeric values Swapping Pairs of Characters in a String in Java Different Ways to Print First K Characters of the String in Java Print the middle character of a string Check if a given string is Pangram in Java Swap the first and last character of a string in Java Java program to swap first and last characters of words in a sentence Java program to expand a String if range is given?

String str. Recommended Posts: Check if a string contains uppercase, lowercase, special characters and numeric values Reverse a string without affecting special characters Program to count vowels, consonant, digits and special characters in string.

Check out this Author's contributed articles. Load Comments. We use cookies to ensure you have the best browsing experience on our website.Given a binary array arr[] of size Nthe task is to find the length of the second longest sequence of consecutive 1s present in the array. Second longest sequence of consecutive ones is 3 i. Below are the steps:. Attention reader! If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.

See your article appearing on the GeeksforGeeks main page and help other Geeks. Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below. Writing code in comment? Please use ide. FindMax arr, N. FindMax arr, n. Python3 implementation of the above approach. Initialise maximum length. Initialise second maximum length. Initialise count. Iterate over the array. If sequence ends. Reset count.

Increase length. Update maximum. Traverse the given array. If sequence continues.