Same Tree

SameTree.java

package com.interviewbytes.trees;

public class SameTree {

    public boolean isSameTree(TreeNode p, TreeNode q) {

        if (p == null && q == null) return true;
        if (p == null || q == null) return false;

        return p.val == q.val && isSameTree(p.left, q.left) && isSameTree(p.right, q.right);
    }
}

TreeNode.java

package com.interviewbytes.trees;

public class TreeNode {

    int val;
    TreeNode left;
    TreeNode right;

    TreeNode(int x) {
        val = x;
    }
}