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Given a square grid of characters in the range ascii[a-z], rearrange elements of each row alphabetically, ascending. Determine if the columns are also in ascending alphabetical order, top to bottom. The rows are already in alphabetical order. The columns a a eb d f and c e g are also in alphabetical order, so the answer would be YES.

Only elements within the same row can be rearranged. They cannot be moved to a different row. Complete the gridChallenge function in the editor below. The first line containsthe number of testcases. Each of the next sets of lines are described as follows: - The first line containsthe number of rows and columns in the grid. Each string consists of lowercase letters in the range ascii[a-z].

For each test case, on a separate line print YES if it is possible to rearrange the grid alphabetically ascending in both its rows and columns, or NO otherwise. The x grid in the test case can be reordered to. This fulfills the condition since the rows 1, 2, We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more retinanet model about how we use cookies. Practice Compete Jobs Leaderboard.

Problem Submissions Leaderboard Discussions Editorial. For example, given: a b c a d e e f g The rows are already in alphabetical order. Function Description Complete the gridChallenge function in the editor below.

Input Format. Output Format. Sample Input. Sample Output. The x grid in the test case can be reordered to abcde fghij klmno pqrst uvwxy This fulfills the condition since the rows 1, 2,GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again.

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**HackerRank - Grid Challenge Solution**

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Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes a minute to sign up. T test cases follow, each having a structure as described below: The first line contains two space-separated integers, R and Cindicating the number of rows and columns in the grid Grespectively. This is followed by R lines, each with a string of C digits, which represent the grid G.

The following line contains two space-separated integers, r and cindicating the number of rows and columns in the pattern grid P. This is followed by r lines, each with a string of c digits, which represent the pattern P. The evaluation will be case sensitive. I borrowed this writeup from a similar question.

Any feedback appreciated - this passes all the tests. I did not really try to optimize beyond passing the test cases and making it fairly simple in order to do that. Anything else would be appreciated too. Being given some generated code doesn't mean you can't criticize it. Unused imports, unused variables, meaningless variable names, unpythonic constructsâ€¦ To organize things a bit more, you should also.

This is to separate the parsing of the input from the core of the computation. It can help you further test your logic without rellying on the input being fed through stdin. A basic layout could be:. As a bonus, having functions will let you return early so you might be able to remove flag variables. Python makes it easy to iterate over content rather than using indexes to access the content.

It is both faster and more pythonic. In case you need the indexes too, use enumerate :. I also incorporated the "match" condition directly within the while loop. But it lead to somewhat duplicated find as you can see, so not that ideal.

And I removed the call to str since slicing a string already returns a string. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 3 years, 11 months ago. Active 3 years, 11 months ago. Viewed 2k times. Given a 2D array of digits, try to find the location of a given 2D pattern of digits.

Input Format The first line contains an integer, Twhich is the number of test cases.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. The original game is a zero player game. The evolution of it depends entirely on its input.

Game of life takes place on a 2D grid. Each cell in the grid will be in one of the two possible states. A cell remains alive if its surrounded by 2 or 3 living cells. Each cell is surrounded by 8 cells, 4 on its sides and 4 on its corners. Cells at the extreme corners have only 3 neighbors and the cells at the extreme right, left, top and bottom of the board have 5 neighboring cells.

The rules mentioned above applies for these cells as well. This version of Game of Life takes place of a 29x29 grid, the top left cell is 0,0 and the bottom right cell is 28, Two players play against each other.

The two states being. Since 3 is odd, majority always exists. Rest of the rules follow the original version of the game. Initially, all the cells are in DEAD state. This goes on till each player has placed 40 cells of their respective colors on the grid.

The game then starts. The alive cells of the maximum color at the end of life cycles wins the game!Bomberman lives in a rectangular grid. Each cell in the grid either contains a bomb or nothing at all. Each bomb can be planted in any cell of the grid but once planted, it will detonate after exactly 3 seconds.

### Use functions

Once a bomb detonates, it's destroyed â€” along with anything in its four neighboring cells. This means that if a bomb detonates in cellany valid cells and are cleared. If there is a bomb in a neighboring cell, the neighboring bomb is destroyed without detonating, so there's no chain reaction.

Note that during every second Bomberman plants bombs, the bombs are planted simultaneously i. Given the initial configuration of the grid with the locations of Bomberman's first batch of planted bombs, determine the state of the grid after seconds.

### Rectangular Game

After the second second, Bomberman has placed all his charges:. Complete the bomberMan function in the editory below.

It should return an array of strings that represent the grid in its final state. The first line contains three space-separated integers, andThe number of rows, columns and seconds to simulate. Each of the next lines contains a row of the matrix as a single string of characters. Print the grid's final state.

This means lines where each line contains characters, and each character is either a. This grid must represent the state of the grid after seconds. Bomberman plants bombs in all the empty cells during his second second, so this is the state after 2 seconds:. In his third second, Bomberman sits back and watches all the bombs he planted 3 seconds ago detonate. This is the final state after seconds:.

We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies. Practice Compete Jobs Leaderboard.

Problem Submissions Leaderboard Discussions Editorial. Bomberman is immune to bombs, so he can move freely throughout the grid. Here's what he does: Initially, Bomberman arbitrarily plants bombs in some of the cells, the initial state.

After one second, Bomberman does nothing. After one more second, Bomberman plants bombs in all cells without bombs, thus filling the whole grid with bombs. No bombs detonate at this point.

After one more second, any bombs planted exactly three seconds ago will detonate. Here, Bomberman stands back and observes. Bomberman then repeats steps 3 and 4 indefinitely. For example, if the initial grid looks like Input Format. Subtask for of the maximum score. Output Format. Sample Input. Sample Output. OOO OO OO OOO The initial state of the grid isYour task is to compute the Pearson product-moment correlation coefficient between the scores of different pairs of subjects Mathematics and Physics, Physics and Chemistry, Mathematics and Chemistry based on this data.

This is a measure of linear correlation described well on this Wikipedia page. The formula, in brief, is given by:. The first row contains an integer N. Each row corresponds to the scores attained by a unique candidate in these three subjects.

The output should contain three lines, with correlation coefficients computed and rounded off correct to exactly 2 decimal places. The first line should contain the correlation coefficient between Mathematics and Physics scores. The second line should contain the correlation coefficient between Physics and Chemistry scores. The third line should contain the correlation coefficient between Chemistry and Mathematics scores. There is one sample test case with scores obtained in Mathematics, Physics and Chemistry by 20 students.

The hidden test case contains the scores obtained by all the candidates who appeared for the examination and took all three tests Mathematics, Physics and Chemistry. Think: How can you efficiently compute the correlation coefficients within the given time constraints, while handling the scores of nearly k students? Each player has nine piece in total. Each piece has a different moving feature and is one of the 3 types of pieces.

This type of piece can move to its own position if its in the second last row of the grid and going downward or if its in the second row of the grid and going upward. Note: Forward direction for first player is downward and for second player is upward. If a piece except piece 1 is moving downward and touches the last row, its direction will change i. Similarly, once if a piece except piece 1 is moving upward and touches the first row, its direction will change i.

At the end of the game the player with majority of pieces will win. Next line will contain an integer denoting the total number of moves till the current state of the board. The y-coordinate increases from left to right, and x-coordinate increases from top to bottom. Empty cell is represented by Output: In the first line print the coordinates of the cell separated by space, the piece you want to move. In second line print the coordinates of the cell in which the piece will jump.

Starting state The starting state of the game is the state of the board before the game starts. First Input This is the input give to the first player at the start of the game. This state will be fed as input to program of player 2. Sample Game. Following is the code for implementing it:. Lilah has a string, sof lowercase English letters that she repeated infinitely many times.

The first line contains a single string, s. The second line contains an integer, n. John Watson performs an operation called a right circular rotation on an array of integers, [a 0 ,a 1.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. It only takes a minute to sign up. Please let me know of any improvements that can be made to my implementation specifically if there's any way to make the algorithm more efficient.

I'd like to make this algorithm optimal. S: My implementation is a brute force algorithm, and I reckon that there's a much better way of solving this problem. But, as the grid is unsorted, I'm not exactly sure what that better method would be.

## Rectangular Game

Programming contests do not generally require much object design. And in this particular case, instance methods just obfuscate reading. Make them public static. And if it gets so big that you need to divvy it up, do it properly, then. Just throw the exception, if you cannot do anything with it. Just knowing if your program has thrown an exception is good.

If the automated judge does not support exception but supports process exit codes, you do a System. Some contests test your code with just small and large data sets, which means you need to find and algorithm with good average complexity.

Some contest, such as ACM, tests the code also with the known worst case scenarios of the best known algorithms that could be used to solve the problem.

In that case you need to find good worst case complexity. Some contests have inputs to weed out naive implementations as your current one. One such case would be X grid of 1s, and X pattern of 1s with a 2 in the bottom right corner. Against such a case you can try an algorithm like :. In that case you can do a search for a pattern column in parallel real or simulated. By doing this check, you can avoid unnecessary iterations of the inner for loops the ones which compare the pattern.

Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 5 years ago. Active 4 years ago. Viewed 7k times. Problem statement as written on HackerRank : Given a 2D array of digits, try to find the location of a given 2D pattern of digits.

Answer: import java. BufferedReader; import java.

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