public bool dfs(Trees.TreeNode root, int start, int dest, List <char> soFar)
{
if (root == null)
{
return(false);
}
bool left = false, right = false;
soFar.Add('L');
left = dfs(root.left, start, dest, soFar);
soFar.RemoveAt(soFar.Count - 1);
soFar.Add('R');
right = dfs(root.right, start, dest, soFar);
soFar.RemoveAt(soFar.Count - 1);
if (left && right) //root is lca
{
IsLcaFound = true;
return(true);
}
else if (left && root.val == start)
{
pathToStart = new List <char>(soFar);
IsLcaFound = true;
return(true);
}
else if (left && root.val == dest)
{
pathToDest = new List <char>(soFar);
IsLcaFound = true;
return(true);
}
else if (right && root.val == start)
{
pathToStart = new List <char>(soFar);
IsLcaFound = true;
return(true);
}
else if (right && root.val == dest)
{
pathToDest = new List <char>(soFar);
IsLcaFound = true;
return(true);
}
else if (root.val == start)
{
pathToStart = new List <char>(soFar);
return(true);
}
else if (root.val == dest)
{
pathToDest = new List <char>(soFar);
return(true);
}
return(left || right || root.val == start || root.val == dest);
}
public string GetDir()
{
string s;
Trees.TreeNode root = new Trees.TreeNode(5);
root.left = new Trees.TreeNode(1);
root.right = new Trees.TreeNode(2);
root.left.left = new Trees.TreeNode(3);
root.right.left = new Trees.TreeNode(6);
root.right.right = new Trees.TreeNode(4);
return(GetDirections(root, 3, 6));
}
public string GetDirections(Trees.TreeNode root, int startValue, int destValue)
{
dfs(root, startValue, destValue, new List <char>());
if (IsLcaFound)
{
StringBuilder result = new StringBuilder();
int i = 0, j = 0;
while (i < pathToStart.Count && j < pathToDest.Count)
{
if (pathToStart[i] != pathToDest[j])
{
break;
}
i++; j++;
}
while (i < pathToStart.Count)
{
result.Append("U");
i++;
}
while (j < pathToDest.Count)
{
result.Append(pathToDest[j]);
j++;
}
return(result.ToString());
}
return("");
}
static void Main(string[] args)
{
int result = Arrays.MaxProfit(ConvertToArray("7,1,5,3,6,4"));
Console.WriteLine($"result={result},expected=7");
bool result2 = Arrays.ContainsDuplicate(ConvertToArray("7,1,5,3,6,4"));
Console.WriteLine($"result={result2},expected=False");
var result3 = ConvertToArray("1,2,3,4,5,6");
Arrays.Rotate(result3, 4);
Console.WriteLine($"result=[{string.Join(",", result3)}],expected=[3,4,5,6,1,2]");
int result4 = Arrays.SingleNumber(ConvertToArray("4,1,2,1,2"));
Console.WriteLine($"result={result4},expected=4");
int[] result5 = Arrays.Intersect(ConvertToArray("1,2,2,1"), ConvertToArray("2,2"));
Console.WriteLine($"result=[{String.Join(",",result5)}],expected=[2,2]");
int[] result6 = Arrays.PlusOne(ConvertToArray("2,9"));
Console.WriteLine($"result=[{String.Join(",", result6)}],expected=[3,0]");
int[] result7 = new int[] { 0, 1, 0, 3, 12 };
Arrays.MoveZeroes(result7);
Console.WriteLine($"result=[{String.Join(",", result7)}],expected=[1,3,12,0,0]");
string result8 = Strings.ReverseString("hello");
Console.WriteLine($"result=[{result8}],expected=[olleh]");
int result9 = Strings.Reverse(-123456);
Console.WriteLine($"result=[{result9}],expected=[-654321]");
int result10 = Strings.FirstUniqChar("abcdabb");
Console.WriteLine($"result={result10},expected=2");
bool result11 = Strings.IsAnagram("anagram", "nagaram");
Console.WriteLine($"result={result11},expected=True");
bool result12 = Strings.IsPalindrome("A man, a plan, a canal: Panama");
Console.WriteLine($"result={result12},expected=True");
int result13 = Strings.MyAtoi(" -4193 with words");
Console.WriteLine($"result=[{result13}],expected=[-4193]");
int[] result14 = Arrays.TwoSum(ConvertToArray("2,11,6,3"), 14);
Console.WriteLine($"result=[{ String.Join(",", result14)}],expected =[1,3]");
string result15 = Strings.LongestCommonPrefix(new string[] { "flower", "flow", "flight" });
Console.WriteLine($"result=[{result15}],expected =[fl]");
LinkedLists.ListNode result16 = LinkedLists.RemoveNthFromEnd(LinkedLists.ConvertToListNode("1,2,3,4,5"), 2);
Console.WriteLine($"result=[{LinkedLists.ListNodeToString(result16)}],expected =[1,2,3,5]");
LinkedLists.ListNode result17 = LinkedLists.ReverseList(LinkedLists.ConvertToListNode("1,2,3,4,5"));
Console.WriteLine($"result=[{LinkedLists.ListNodeToString(result17)}],expected =[5,4,3,2,1]");
bool result18 = Strings.IsPalindrome(121);
Console.WriteLine($"result={result18},expected=True");
LinkedLists.ListNode result19 = LinkedLists.MergeTwoLists(
LinkedLists.ConvertToListNode("1,2,4"),
LinkedLists.ConvertToListNode("1,3,4"));
Console.WriteLine($"result=[{LinkedLists.ListNodeToString(result19)}],expected =[1,1,2,3,4,4]");
String result20 = Strings.CountAndSay(6);
Console.WriteLine($"result={result20},expected=312211");
bool result21 = LinkedLists.IsPalindrome(LinkedLists.ConvertToListNode("1,2,3,2,1"));
Console.WriteLine($"result=[{result21}],expected =[True]");
bool result22 = LinkedLists.IsPalindrome2(LinkedLists.ConvertToListNode("1,2,3, 2,1"));
Console.WriteLine($"result=[{result22}],expected =[True]");
int result23 = Trees.MaxDepth(Trees.CreateBinaryTree(new int?[] { 3, 9, 20, null, null, 15, 7 }));
Console.WriteLine($"result=[{result23}],expected =[3]");
bool result24 = Trees.IsValidBST(Trees.CreateBinaryTree(new int?[] { 5, 1, 4, null, null, 3, 6 }));
Console.WriteLine($"result=[{result24}],expected =[False]");
bool result25 = Trees.IsSymmetric(Trees.CreateBinaryTree(new int?[] { 1, 2, 2, 3, 4, 4, 3 }));
Console.WriteLine($"result=[{result25}],expected =[True]");
var result26 = Trees.LevelOrder(Trees.CreateBinaryTree(new int?[] { 3, 9, 20, null, null, 15, 7 }));
Console.WriteLine($"result={ListOfListsToString(result26)},expected = [[3],[9,20],[15,7]]");
var result27 = Trees.TreeNodeToString(Trees.CreateBinaryTree(new int?[] { 3, 9, 20, null, null, 15, 7 }));
Console.WriteLine($"result={result27},expected = [3,9,20,null,null,15,7,null,null,null,null,]");
Trees.TreeNode result28 = Trees.SortedArrayToBST(new[] { -10, -3, 0, 5, 9 });
Console.WriteLine($"result={Trees.TreeNodeToString(result28)},expected = [0,-10,5,null,-3,null,9,null,null,null,null,]");
var result29 = new[] { 1, 2, 3, 0, 0, 0 };
Arrays.MergeSorted(result29, 3, new[] { 2, 5, 6 }, 3);
Console.WriteLine($"result=[{string.Join(",", result29)}],expected=[1,2,2,3,5,6]");
LinkedLists.ListNode result30 = LinkedLists.AddTwoNumbers(
LinkedLists.ConvertToListNode("1,9,9"),
LinkedLists.ConvertToListNode("9"));
Console.WriteLine($"result=[{LinkedLists.ListNodeToString(result30)}],expected =[0,0,0,1]");
int result31 = Strings.LengthOfLongestSubstring("peerpe");
Console.WriteLine($"result={result31},expected=3");
Console.WriteLine($"result={Strings.RomanToInt("LVIII")},expected=58");
Console.WriteLine($"result={Strings.RomanToInt("MCMXCIV")},expected=1994");
Console.WriteLine($"result=[{ListOfListsToString(Arrays.FourSum(new[] { 1, 0, -1, 0, -2, 2 }, 0))}],expected=[[-1, 0, 0, 1],[-2, -1, 1, 2],[-2, 0, 0, 2]]");
Console.WriteLine($"result={DynamicProgramming.ClimbStairs(5)},expected=8");
Console.WriteLine($"result={Strings.LongestPalindrome("cbbd")},expected=cbbd");
Console.ReadLine();
}
