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Anti Diagonals - The Coding Shala

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Home >> Interview Questions >> Anti Diagonals Anti Diagonals Java Solution Give an N*N square matrix, return an array of its anti-diagonals. Look at the example for more details. Example: Input: 1 2 3 7 8 9 4 5 6 Return the following : [ [1], [2, 4], [3, 5, 7], [6, 8], [9] ] Input : 1 2 3 4 Return the following : [ [1], [2, 3], [4] ] Anti Diagonals Java Solution 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 public class Solution { public ArrayList < ArrayList < Integer >> diagonal ( ArrayList < ArrayList < Integer >> A ) { ArrayList < ArrayList < Integer >> ans = new ArrayList < ArrayList < Integer >>(); int N = A . size (); int i = N - 1 ; while ( i >= 0 ){ ArrayList < Integer > tmp = new ArrayList < Integer >(); ...
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Maximum Absolute Difference - The Coding Shala

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Home >> Programming Questions >> Maximum Absolute Difference Maximum Absolute Difference InterviewBit Solution You are given an array of N integers, A 1 , A2, …, A N . Return maximum value of   f(i, j)   for all 1 ≤   i, j   ≤ N. f(i, j)  is defined as  |A[i] - A[j]| + |i - j| , where |x| denotes the absolute value of x. For example , A=[1, 3, -1] f(1, 1) = f(2, 2) = f(3, 3) = 0 f(1, 2) = f(2, 1) = |1 - 3| + |1 - 2| = 3 f(1, 3) = f(3, 1) = |1 - (-1)| + |1 - 3| = 4 f(2, 3) = f(3, 2) = |3 - (-1)| + |2 - 3| = 5 So, we return 5. Solution Here function f(i, j) = |A[i] - A[j]| + |i-j] can be written in four ways -  (A[i] + i) - (A[j] + j) -(A[i] - i) + (A[j] - j) (A[i] - i) - (A[j] - j) (-A[i] - i) + (A[j] + j) = -(A[i] + i) + (A[j] + j) we just have to store minimum and maximum values of expressions  A[i] + i  and  A[i] - i  for all  i. Java Code:: 1 2 3 4 5...
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Java Program to Find GCD or HCF of Two Numbers - The Coding Shala

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Java Program to Reverse a String using Stack - The Coding Shala

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Binary Tree Level Order Traversal - The Coding Shala

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