DSA in Python - Backtracking
Free Preview - 5 Backtracking Problems Rat in a maze Problem """ N = 4 m[][] = {{1, 0, 0, 0}, {1, 1, 0, 1}, {1, 1, 0, 0}, {0, 1, 1, 1}} Output: DDRDRR DRDDRR Explanation: The rat can reach the destination at (3, 3) from (0, 0) by two paths - DRDDRR and DDRDRR, when printed in sorted order we get DDRDRR DRDDRR. """ def setup(): global v v = [[0 for i in range(100)] for j in range(100)] global ans ans = [] def path(arr, x, y, pth, n): if x==n-1 and y==n-1: global ans ans....