import java.util.*; public class GFG { // Variable to keep track of time static int time = 1; // Function to perform DFS starting from node u static void dfs(int u, ArrayList<ArrayList<Integer> > aList, int pre[], int post[], int vis[]) { // Storing the pre number whenever...
// Java implementation of the approach import java.util.*; class GFG { // Pair class static class pair { int first,second; pair(int a, int b) { first = a; second = b; } } // Function to perform DFS on the tree static void dfs(Vector t, int node, int parent) { int flag ...
// C# program to count // islands in boolean // 2D matrix using System; class GFG { // No of rows // and columns static int ROW = 5, COL = 5; // A function to check if // a given cell (row, col) // can be included in DFS static bool isSafe(int[, ] M, int row, ...
// Java program to implement // the above approach import java.util.*; class GFG { // Direction vectors static int dRow[] = { -1, 0, 1, 0 }; static int dCol[] = { 0, 1, 0, -1 }; // Function to check if current // position is valid or not static boolean isValid(boole...