public class Solution {
public boolean isSameTree(TreeNode p, TreeNode q) {
if(p==null&&q==null){
return true;
}else if(p==null||q==null){
return false ;
}
if(p.val != q.val){
return false;
}
boolean left = isSameTree(p.left,q.left);
boolean right = isSameTree(p.right,q.right);
return left&&right ;
}
}
public boolean isSameTree(TreeNode p, TreeNode q) {
if(p==null&&q==null){
return true;
}else if(p==null||q==null){
return false ;
}
if(p.val != q.val){
return false;
}
boolean left = isSameTree(p.left,q.left);
boolean right = isSameTree(p.right,q.right);
return left&&right ;
}
}