LeetCode-in-TypeScript · javadev · Apr 20, 2025 · Apr 20, 2025
diff --git a/src/main/ts/g0001_0100/s0002_add_two_numbers/solution.ts b/src/main/ts/g0001_0100/s0002_add_two_numbers/solution.ts
@@ -5,7 +5,7 @@
 
 import { ListNode } from '../../com_github_leetcode/listnode'
 
-/*
+/**
  * Definition for singly-linked list.
  * class ListNode {
  *     val: number

diff --git a/src/main/ts/g0001_0100/s0023_merge_k_sorted_lists/solution.ts b/src/main/ts/g0001_0100/s0023_merge_k_sorted_lists/solution.ts
@@ -4,7 +4,7 @@
 
 import { ListNode } from '../../com_github_leetcode/listnode'
 
-/*
+/**
  * Definition for singly-linked list.
  * class ListNode {
  *     val: number

diff --git a/src/main/ts/g0001_0100/s0030_substring_with_concatenation_of_all_words/solution.ts b/src/main/ts/g0001_0100/s0030_substring_with_concatenation_of_all_words/solution.ts
@@ -6,32 +6,26 @@ function findSubstring(s: string, words: string[]): number[] {
     let n1 = words[0].length
     let n2 = s.length
     let map1 = new Map<string, number>()
-
     for (let ch of words) {
         map1.set(ch, (map1.get(ch) ?? 0) + 1)
     }
-
     for (let i = 0; i < n1; i++) {
         let left = i
         let j = i
         let c = 0
         let map2 = new Map<string, number>()
-
         while (j + n1 <= n2) {
             let word1 = s.substring(j, j + n1)
             j += n1
-
             if (map1.has(word1)) {
                 map2.set(word1, (map2.get(word1) ?? 0) + 1)
                 c++
-
                 while ((map2.get(word1) ?? 0) > (map1.get(word1) ?? 0)) {
                     let word2 = s.substring(left, left + n1)
                     map2.set(word2, (map2.get(word2) ?? 0) - 1)
                     left += n1
                     c--
                 }
-
                 if (c === words.length) {
                     ans.push(left)
                 }

diff --git a/src/main/ts/g0001_0100/s0031_next_permutation/solution.ts b/src/main/ts/g0001_0100/s0031_next_permutation/solution.ts
@@ -6,15 +6,14 @@
  */
 function nextPermutation(nums: number[]): void {
     let swapperIndex: number | null = null
-
     for (let ind = nums.length - 1; ind >= 0 && swapperIndex == null; ind--) {
         if (nums[ind] > nums[ind - 1]) {
             swapperIndex = ind - 1
         }
     }
-
-    if (swapperIndex == null) nums.sort((a, b) => a - b)
-    else {
+    if (swapperIndex == null) {
+        nums.sort((a, b) => a - b)
+    } else {
         nums.splice(swapperIndex + 1, nums.length, ...nums.slice(swapperIndex + 1, nums.length).sort((a, b) => a - b))
         let indToBringForward = swapperIndex + 1
         while (nums[indToBringForward] <= nums[swapperIndex]) ++indToBringForward

diff --git a/...n/ts/g0001_0100/s0034_find_first_and_last_position_of_element_in_sorted_array/solution.ts b/...n/ts/g0001_0100/s0034_find_first_and_last_position_of_element_in_sorted_array/solution.ts
@@ -9,7 +9,6 @@ function searchRange(nums: number[], target: number): number[] { //NOSONAR
     let left2 = left1
     let right1 = nums.length - 1
     let right2 = right1
-
     while (left1 <= right1 || left2 <= right2) {
         if (left1 <= right1) {
             let mid1 = Math.floor((left1 + right1) / 2)
@@ -22,7 +21,6 @@ function searchRange(nums: number[], target: number): number[] { //NOSONAR
                 right1 = mid1 - 1
             }
         }
-
         if (left2 <= right2) {
             let mid2 = Math.floor((left2 + right2) / 2)
             if (nums[mid2] == target) {

diff --git a/src/main/ts/g0001_0100/s0036_valid_sudoku/solution.ts b/src/main/ts/g0001_0100/s0036_valid_sudoku/solution.ts
@@ -5,19 +5,16 @@ function isValidSudoku(board: string[][]): boolean {
     let rowSet: number[] = new Array(9).fill(0)
     let colSet: number[] = new Array(9).fill(0)
     let boxSet: number[] = new Array(9).fill(0)
-
     for (let i = 0; i < 9; i++) {
         for (let j = 0; j < 9; j++) {
             if (board[i][j] === '.') {
                 continue
             }
             let val = board[i][j].charCodeAt(0) - '0'.charCodeAt(0)
             let boxIndex = Math.floor(i / 3) * 3 + Math.floor(j / 3)
-
             if (rowSet[i] & (1 << val) || colSet[j] & (1 << val) || boxSet[boxIndex] & (1 << val)) {
                 return false
             }
-
             rowSet[i] |= 1 << val
             colSet[j] |= 1 << val
             boxSet[boxIndex] |= 1 << val

diff --git a/src/main/ts/g0001_0100/s0039_combination_sum/solution.ts b/src/main/ts/g0001_0100/s0039_combination_sum/solution.ts
@@ -6,7 +6,6 @@
 function combinationSum(candidates: number[], target: number): number[][] {
     const result: number[][] = []
     const path: number[] = []
-
     const comFunct = (index: number, sum: number) => {
         if (sum === target) {
             result.push([...path])

diff --git a/src/main/ts/g0001_0100/s0054_spiral_matrix/solution.ts b/src/main/ts/g0001_0100/s0054_spiral_matrix/solution.ts
@@ -8,29 +8,24 @@ function spiralOrder(matrix: number[][]): number[] {
         c = 0
     let bigR = matrix.length - 1
     let bigC = matrix[0].length - 1
-
     while (r <= bigR && c <= bigC) {
         for (let i = c; i <= bigC; i++) {
             result.push(matrix[r][i])
         }
         r++
-
         for (let i = r; i <= bigR; i++) {
             result.push(matrix[i][bigC])
         }
         bigC--
-
         for (let i = bigC; i >= c && r <= bigR; i--) {
             result.push(matrix[bigR][i])
         }
         bigR--
-
         for (let i = bigR; i >= r && c <= bigC; i--) {
             result.push(matrix[i][c])
         }
         c++
     }
-
     return result
 }
 

diff --git a/src/main/ts/g0001_0100/s0070_climbing_stairs/solution.ts b/src/main/ts/g0001_0100/s0070_climbing_stairs/solution.ts
@@ -4,9 +4,15 @@
 // #Big_O_Time_O(n)_Space_O(n) #2025_03_23_Time_0_ms_(100.00%)_Space_56.23_MB_(5.15%)
 
 function climbStairs(n: number, memo: Record<string, number> = {}): number {
-    if (n in memo) return memo[n]
-    if (n === 0) return 1
-    if (n < 0) return 0
+    if (n in memo) {
+        return memo[n]
+    }
+    if (n === 0) {
+        return 1
+    }
+    if (n < 0) {
+        return 0
+    }
     memo[n] = climbStairs(n - 1, memo) + climbStairs(n - 2, memo)
     return memo[n]
 }

diff --git a/src/main/ts/g0001_0100/s0072_edit_distance/solution.ts b/src/main/ts/g0001_0100/s0072_edit_distance/solution.ts
@@ -8,7 +8,9 @@ function minDistance(word1: string, word2: string): number {
     const l1 = word1.length
     const l2 = word2.length
     const dfs = (w1: number, w2: number): number => {
-        if (memo[w1][w2] != undefined) return memo[w1][w2]
+        if (memo[w1][w2] != undefined) {
+            return memo[w1][w2]
+        }
         if (w1 == l1 && w2 == l2) {
             memo[w1][w2] = 0
             return 0

diff --git a/src/main/ts/g0001_0100/s0078_subsets/solution.ts b/src/main/ts/g0001_0100/s0078_subsets/solution.ts
@@ -4,7 +4,9 @@
 
 function subsets(nums: number[]): number[][] {
     const sets: number[][] = [[]]
-    for (const num of nums) sets.push(...sets.map((set) => [...set, num]))
+    for (const num of nums) {
+        sets.push(...sets.map((set) => [...set, num]))
+    }
     return sets
 }
 

diff --git a/src/main/ts/g0001_0100/s0079_word_search/solution.ts b/src/main/ts/g0001_0100/s0079_word_search/solution.ts
@@ -12,7 +12,6 @@ function exist(board: string[][], word: string): boolean {
             if (loop(marks, board, i, j, word, 0)) return true
         }
     }
-
     return ret
 }
 
@@ -31,28 +30,29 @@ function loop(marks: boolean[][], board: string[][], i: number, j: number, word:
     if (i < 0 || j < 0 || i >= board.length || j >= board[i].length || marks[i][j]) {
         return false
     }
-
     if (board[i][j] !== word.charAt(index)) {
         return false
     } else if (index === word.length - 1) {
         return true
     }
-
     marks[i][j] = true
     index++
-
     let r = loop(marks, board, i - 1, j, word, index)
-    if (r) return true
-
+    if (r) {
+        return true
+    }
     r = loop(marks, board, i + 1, j, word, index)
-    if (r) return true
-
+    if (r) {
+        return true
+    }
     r = loop(marks, board, i, j - 1, word, index)
-    if (r) return true
-
+    if (r) {
+        return true
+    }
     r = loop(marks, board, i, j + 1, word, index)
-    if (r) return true
-
+    if (r) {
+        return true
+    }
     marks[i][j] = false
     return false
 }

diff --git a/src/main/ts/g0001_0100/s0094_binary_tree_inorder_traversal/solution.ts b/src/main/ts/g0001_0100/s0094_binary_tree_inorder_traversal/solution.ts
@@ -4,7 +4,7 @@
 
 import { TreeNode } from '../../com_github_leetcode/treenode'
 
-/*
+/**
  * Definition for a binary tree node.
  * class TreeNode {
  *     val: number
@@ -18,8 +18,12 @@ import { TreeNode } from '../../com_github_leetcode/treenode'
  * }
  */
 function inorderTraversal(root: TreeNode | null): number[] {
-    if (!root) return []
-    if (!root.val) return []
+    if (!root) {
+        return []
+    }
+    if (!root.val) {
+        return []
+    }
     const result: number[] = []
     function traverse(node: TreeNode, arr: number[]) {
         if (node.left) {

diff --git a/src/main/ts/g0001_0100/s0098_validate_binary_search_tree/solution.ts b/src/main/ts/g0001_0100/s0098_validate_binary_search_tree/solution.ts
@@ -19,9 +19,15 @@ import { TreeNode } from '../../com_github_leetcode/treenode'
  * }
  */
 function dfs(node: TreeNode | null, lowerBound: number, upperBound: number): boolean {
-    if (!node) return true
-    if (node.val <= lowerBound) return false
-    if (node.val >= upperBound) return false
+    if (!node) {
+        return true
+    }
+    if (node.val <= lowerBound) {
+        return false
+    }
+    if (node.val >= upperBound) {
+        return false
+    }
     return dfs(node.left, lowerBound, node.val) && dfs(node.right, node.val, upperBound)
 }
 

diff --git a/src/main/ts/g0101_0200/s0101_symmetric_tree/solution.ts b/src/main/ts/g0101_0200/s0101_symmetric_tree/solution.ts
@@ -5,7 +5,7 @@
 
 import { TreeNode } from '../../com_github_leetcode/treenode'
 
-/*
+/**
  * Definition for a binary tree node.
  * class TreeNode {
  *     val: number
@@ -19,14 +19,20 @@ import { TreeNode } from '../../com_github_leetcode/treenode'
  * }
  */
 function isSymmetric(root: TreeNode | null): boolean {
-    if (!root.left && !root.right) return true
+    if (!root.left && !root.right) {
+        return true
+    }
     const queue: [TreeNode, TreeNode][] = [[root.left, root.right]]
     while (queue.length > 0) {
         let qLen: number = queue.length
         while (qLen-- > 0) {
             const [leftNode, rightNode] = queue.shift()
-            if (!leftNode && !rightNode) continue
-            if (!leftNode || !rightNode || leftNode.val != rightNode.val) return false
+            if (!leftNode && !rightNode) {
+                continue
+            }
+            if (!leftNode || !rightNode || leftNode.val != rightNode.val) {
+                return false
+            }
             queue.push([leftNode.left, rightNode.right])
             queue.push([leftNode.right, rightNode.left])
         }

diff --git a/src/main/ts/g0101_0200/s0102_binary_tree_level_order_traversal/solution.ts b/src/main/ts/g0101_0200/s0102_binary_tree_level_order_traversal/solution.ts
@@ -5,7 +5,7 @@
 
 import { TreeNode } from '../../com_github_leetcode/treenode'
 
-/*
+/**
  * Definition for a binary tree node.
  * class TreeNode {
  *     val: number
@@ -19,7 +19,9 @@ import { TreeNode } from '../../com_github_leetcode/treenode'
  * }
  */
 function levelOrder(root: TreeNode | null): number[][] {
-    if (root == null) return []
+    if (root == null) {
+        return []
+    }
     let queue = [root]
     let result = []
     while (queue.length != 0) {
@@ -28,8 +30,12 @@ function levelOrder(root: TreeNode | null): number[][] {
         while (length > 0) {
             let node = queue.shift()
             subResult.push(node.val)
-            if (node.left != null) queue.push(node.left)
-            if (node.right != null) queue.push(node.right)
+            if (node.left != null) {
+                queue.push(node.left)
+            }
+            if (node.right != null) {
+                queue.push(node.right)
+            }
             length--
         }
         result.push(subResult)

diff --git a/src/main/ts/g0101_0200/s0104_maximum_depth_of_binary_tree/solution.ts b/src/main/ts/g0101_0200/s0104_maximum_depth_of_binary_tree/solution.ts
@@ -6,7 +6,7 @@
 
 import { TreeNode } from '../../com_github_leetcode/treenode'
 
-/*
+/**
  * Definition for a binary tree node.
  * class TreeNode {
  *     val: number

diff --git a/...ts/g0101_0200/s0105_construct_binary_tree_from_preorder_and_inorder_traversal/solution.ts b/...ts/g0101_0200/s0105_construct_binary_tree_from_preorder_and_inorder_traversal/solution.ts
@@ -4,7 +4,7 @@
 
 import { TreeNode } from '../../com_github_leetcode/treenode'
 
-/*
+/**
  * Definition for a binary tree node.
  * class TreeNode {
  *     val: number

diff --git a/src/main/ts/g0101_0200/s0114_flatten_binary_tree_to_linked_list/solution.ts b/src/main/ts/g0101_0200/s0114_flatten_binary_tree_to_linked_list/solution.ts
@@ -4,7 +4,7 @@
 
 import { TreeNode } from '../../com_github_leetcode/treenode'
 
-/*
+/**
  * Definition for a binary tree node.
  * class TreeNode {
  *     val: number

diff --git a/src/main/ts/g0101_0200/s0124_binary_tree_maximum_path_sum/solution.ts b/src/main/ts/g0101_0200/s0124_binary_tree_maximum_path_sum/solution.ts
@@ -4,7 +4,7 @@
 
 import { TreeNode } from '../../com_github_leetcode/treenode'
 
-/*
+/**
  * Definition for a binary tree node.
  * class TreeNode {
  *     val: number

diff --git a/src/main/ts/g0101_0200/s0138_copy_list_with_random_pointer/solution.ts b/src/main/ts/g0101_0200/s0138_copy_list_with_random_pointer/solution.ts
@@ -4,7 +4,7 @@
 
 import { Node } from '../../com_github_leetcode/node'
 
-/*
+/**
  * Definition for Node.
  * class Node {
  *     val: number