Write a java program to find common elements in three sorted arrays.
Given three sorted arrays, write a code to print intersection of three sorted arrays.
For example –
arr1 = {1, 5, 10, 20, 40, 80};
arr2 = {6, 7, 20, 80, 100};
arr3 = {3, 4, 15, 20, 30, 70, 80, 120};
Output : {20, 80}
20 and 80 are the common elements in 3 arrays. These two elements are the intersection of 3 sorted arrays.
Write a java program to find sum of digits of a number. Given an input number, we have to write a java code to calculate sum of digits of a number.
For example –
i)
Input : 256
Output : 13 (2+5+60
ii)
Input : 15
Output : 6 (1+5)
Write a java code to check balanced parentheses in an expression using stack.
Given an expression containing characters ‘{‘,’}’,'(‘,’)’,'[‘,’]’. We have to write a code to check whether an input string has valid parentheses.
An input string is valid if:
Open brackets must be closed by the same type of brackets.
Open brackets must be closed in the correct order.
Example –
i) {[]}) – Invalid
ii) {()}[] – Valid