Given a string as input return true or false depending on whether it satisfies these rules: 1) The string begins with an 'x' 2) Each 'x' is followed by nothing, 'x' or 'yy' 3) Each 'yy' is followed by nothing or 'x'

JAVA LAB PROGRAMMING Write a Java program to find nth Catlan number. Try to give the highly Optimised Code and code should take input from the user.

PROBLEM STATEMENT: Return the longest String! CN YOU HELP ME WITH THIS JAVA CODE PROBLEM

In Coral Language 3.22 LAB: Loops: Countdown until matching digits   Write a program that takes in an integer in the range 20-98 as input. The output is a countdown starting from the integer, and stopping when both output digits are identical. Ex: If the input is: 93 the output is: 93 92 91 90 89 88 Ex: If the input is: 77 the output is: 77 Ex: If the input is: 9 or any number not between 20 and 98 (inclusive), the output is: Input must be 20-98 For coding simplicity, follow each output number by a space, even the last one. Use a while loop. Compare the digits; do not write a large if-else for all possible same-digit numbers (11, 22, 33, …, 88), as that approach would be cumbersome for large ranges.