Added tasks 3407-3414

Author: javadev

src/main/java/g3401_3500/s3407_substring_matching_pattern/Solution.java

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+package g3401_3500.s3407_substring_matching_pattern;
+
+// #Easy #String #String_Matching #2025_01_06_Time_1_(100.00%)_Space_42.63_(100.00%)
+
+public class Solution {
+    public boolean hasMatch(String s, String p) {
+        int index = -1;
+        for (int i = 0; i < p.length(); i++) {
+            if (p.charAt(i) == '*') {
+                index = i;
+                break;
+            }
+        }
+        int num1 = fun(s, p.substring(0, index));
+        if (num1 == -1) {
+            return false;
+        }
+        int num2 = fun(s.substring(num1), p.substring(index + 1));
+        return num2 != -1;
+    }
+
+    private int fun(String s, String k) {
+        int n = s.length();
+        int m = k.length();
+        int j = 0;
+        for (int i = 0; i <= n - m; i++) {
+            for (j = 0; j < m; j++) {
+                char ch1 = s.charAt(j + i);
+                char ch2 = k.charAt(j);
+                if (ch1 != ch2) break;
+            }
+            if (j == m) {
+                return i + j;
+            }
+        }
+        return -1;
+    }
+}

src/main/java/g3401_3500/s3407_substring_matching_pattern/readme.md

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+3407\. Substring Matching Pattern
+
+Easy
+
+You are given a string `s` and a pattern string `p`, where `p` contains **exactly one** `'*'` character.
+
+The `'*'` in `p` can be replaced with any sequence of zero or more characters.
+
+Return `true` if `p` can be made a substring of `s`, and `false` otherwise.
+
+A **substring** is a contiguous **non-empty** sequence of characters within a string.
+
+**Example 1:**
+
+**Input:** s = "leetcode", p = "ee\*e"
+
+**Output:** true
+
+**Explanation:**
+
+By replacing the `'*'` with `"tcod"`, the substring `"eetcode"` matches the pattern.
+
+**Example 2:**
+
+**Input:** s = "car", p = "c\*v"
+
+**Output:** false
+
+**Explanation:**
+
+There is no substring matching the pattern.
+
+**Example 3:**
+
+**Input:** s = "luck", p = "u\*"
+
+**Output:** true
+
+**Explanation:**
+
+The substrings `"u"`, `"uc"`, and `"uck"` match the pattern.
+
+**Constraints:**
+
+*   `1 <= s.length <= 50`
+*   `1 <= p.length <= 50`
+*   `s` contains only lowercase English letters.
+*   `p` contains only lowercase English letters and exactly one `'*'`

src/main/java/g3401_3500/s3408_design_task_manager/TaskManager.java

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+package g3401_3500.s3408_design_task_manager;
+
+// #Medium #Hash_Table #Design #Ordered_Set #Heap_Priority_Queue
+// #2025_01_06_Time_349_(100.00%)_Space_152.40_(100.00%)
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeSet;
+
+public class TaskManager {
+
+    private TreeSet<int[]> tasks;
+    private Map<Integer, int[]> taskMap;
+
+    public TaskManager(List<List<Integer>> tasks) {
+        this.tasks = new TreeSet<>((a, b) -> b[2] == a[2] ? b[1] - a[1] : b[2] - a[2]);
+        this.taskMap = new HashMap<>();
+        for (List<Integer> task : tasks) {
+            int[] t = new int[] {task.get(0), task.get(1), task.get(2)};
+            this.tasks.add(t);
+            this.taskMap.put(task.get(1), t);
+        }
+    }
+
+    public void add(int userId, int taskId, int priority) {
+        int[] task = new int[] {userId, taskId, priority};
+        this.tasks.add(task);
+        this.taskMap.put(taskId, task);
+    }
+
+    public void edit(int taskId, int newPriority) {
+        int[] task = taskMap.get(taskId);
+        tasks.remove(task);
+        taskMap.remove(taskId);
+        int[] newTask = new int[] {task[0], task[1], newPriority};
+        tasks.add(newTask);
+        taskMap.put(taskId, newTask);
+    }
+
+    public void rmv(int taskId) {
+        this.tasks.remove(this.taskMap.get(taskId));
+        this.taskMap.remove(taskId);
+    }
+
+    public int execTop() {
+        if (this.tasks.isEmpty()) {
+            return -1;
+        }
+        int[] task = this.tasks.pollFirst();
+        this.taskMap.remove(task[1]);
+        return task[0];
+    }
+}
+
+/*
+ * Your TaskManager object will be instantiated and called as such:
+ * TaskManager obj = new TaskManager(tasks);
+ * obj.add(userId,taskId,priority);
+ * obj.edit(taskId,newPriority);
+ * obj.rmv(taskId);
+ * int param_4 = obj.execTop();
+ */

src/main/java/g3401_3500/s3408_design_task_manager/readme.md

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+3408\. Design Task Manager
+
+Medium
+
+There is a task management system that allows users to manage their tasks, each associated with a priority. The system should efficiently handle adding, modifying, executing, and removing tasks.
+
+Implement the `TaskManager` class:
+
+*   `TaskManager(vector<vector<int>>& tasks)` initializes the task manager with a list of user-task-priority triples. Each element in the input list is of the form `[userId, taskId, priority]`, which adds a task to the specified user with the given priority.
+    
+*   `void add(int userId, int taskId, int priority)` adds a task with the specified `taskId` and `priority` to the user with `userId`. It is **guaranteed** that `taskId` does not _exist_ in the system.
+    
+*   `void edit(int taskId, int newPriority)` updates the priority of the existing `taskId` to `newPriority`. It is **guaranteed** that `taskId` _exists_ in the system.
+    
+*   `void rmv(int taskId)` removes the task identified by `taskId` from the system. It is **guaranteed** that `taskId` _exists_ in the system.
+    
+*   `int execTop()` executes the task with the **highest** priority across all users. If there are multiple tasks with the same **highest** priority, execute the one with the highest `taskId`. After executing, the `taskId` is **removed** from the system. Return the `userId` associated with the executed task. If no tasks are available, return -1.
+    
+
+**Note** that a user may be assigned multiple tasks.
+
+**Example 1:**
+
+**Input:**   
+ ["TaskManager", "add", "edit", "execTop", "rmv", "add", "execTop"]   
+ [[[[1, 101, 10], [2, 102, 20], [3, 103, 15]]], [4, 104, 5], [102, 8], [], [101], [5, 105, 15], []]
+
+**Output:**   
+ [null, null, null, 3, null, null, 5]
+
+**Explanation**
+
+TaskManager taskManager = new TaskManager([[1, 101, 10], [2, 102, 20], [3, 103, 15]]); // Initializes with three tasks for Users 1, 2, and 3.   
+ taskManager.add(4, 104, 5); // Adds task 104 with priority 5 for User 4.   
+ taskManager.edit(102, 8); // Updates priority of task 102 to 8.   
+ taskManager.execTop(); // return 3. Executes task 103 for User 3.   
+ taskManager.rmv(101); // Removes task 101 from the system.   
+ taskManager.add(5, 105, 15); // Adds task 105 with priority 15 for User 5.   
+ taskManager.execTop(); // return 5. Executes task 105 for User 5.
+
+**Constraints:**
+
+*   <code>1 <= tasks.length <= 10<sup>5</sup></code>
+*   <code>0 <= userId <= 10<sup>5</sup></code>
+*   <code>0 <= taskId <= 10<sup>5</sup></code>
+*   <code>0 <= priority <= 10<sup>9</sup></code>
+*   <code>0 <= newPriority <= 10<sup>9</sup></code>
+*   At most <code>2 * 10<sup>5</sup></code> calls will be made in **total** to `add`, `edit`, `rmv`, and `execTop` methods.

src/main/java/g3401_3500/s3409_longest_subsequence_with_decreasing_adjacent_difference/Solution.java

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+package g3401_3500.s3409_longest_subsequence_with_decreasing_adjacent_difference;
+
+// #Medium #Array #Dynamic_Programming #2025_01_07_Time_68_(99.55%)_Space_45.74_(78.73%)
+
+public class Solution {
+    public int longestSubsequence(int[] nums) {
+        int max = 0;
+        for (int n : nums) {
+            max = Math.max(n, max);
+        }
+        max += 1;
+        int[][] dp = new int[max][max];
+        for (int i : nums) {
+            int v = 1;
+            for (int diff = max - 1; diff >= 0; diff--) {
+                if (i + diff < max) {
+                    v = Math.max(v, dp[i + diff][diff] + 1);
+                }
+                if (i - diff >= 0) {
+                    v = Math.max(v, dp[i - diff][diff] + 1);
+                }
+                dp[i][diff] = v;
+            }
+        }
+        int res = 0;
+        for (int[] i : dp) {
+            for (int j : i) {
+                res = Math.max(res, j);
+            }
+        }
+        return res;
+    }
+}

src/main/java/g3401_3500/s3409_longest_subsequence_with_decreasing_adjacent_difference/readme.md

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+3409\. Longest Subsequence With Decreasing Adjacent Difference
+
+Medium
+
+You are given an array of integers `nums`.
+
+Your task is to find the length of the **longest subsequence** `seq` of `nums`, such that the **absolute differences** between _consecutive_ elements form a **non-increasing sequence** of integers. In other words, for a subsequence <code>seq<sub>0</sub></code>, <code>seq<sub>1</sub></code>, <code>seq<sub>2</sub></code>, ..., <code>seq<sub>m</sub></code> of `nums`, <code>|seq<sub>1</sub> - seq<sub>0</sub>| >= |seq<sub>2</sub> - seq<sub>1</sub>| >= ... >= |seq<sub>m</sub> - seq<sub>m - 1</sub>|</code>.
+
+Return the length of such a subsequence.
+
+A **subsequence** is an **non-empty** array that can be derived from another array by deleting some or no elements without changing the order of the remaining elements.
+
+**Example 1:**
+
+**Input:** nums = [16,6,3]
+
+**Output:** 3
+
+**Explanation:**
+
+The longest subsequence is `[16, 6, 3]` with the absolute adjacent differences `[10, 3]`.
+
+**Example 2:**
+
+**Input:** nums = [6,5,3,4,2,1]
+
+**Output:** 4
+
+**Explanation:**
+
+The longest subsequence is `[6, 4, 2, 1]` with the absolute adjacent differences `[2, 2, 1]`.
+
+**Example 3:**
+
+**Input:** nums = [10,20,10,19,10,20]
+
+**Output:** 5
+
+**Explanation:**
+
+The longest subsequence is `[10, 20, 10, 19, 10]` with the absolute adjacent differences `[10, 10, 9, 9]`.
+
+**Constraints:**
+
+*   <code>2 <= nums.length <= 10<sup>4</sup></code>
+*   `1 <= nums[i] <= 300`

src/main/java/g3401_3500/s3410_maximize_subarray_sum_after_removing_all_occurrences_of_one_element/Solution.java

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+package g3401_3500.s3410_maximize_subarray_sum_after_removing_all_occurrences_of_one_element;
+
+// #Hard #Array #Dynamic_Programming #Segment_Tree #2025_01_07_Time_51_(97.96%)_Space_57.22_(85.71%)
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class Solution {
+    public long maxSubarraySum(int[] nums) {
+        Map<Long, Long> prefixMap = new HashMap<>();
+        long result = nums[0];
+        long prefixSum = 0;
+        long minPrefix = 0;
+        prefixMap.put(0L, 0L);
+        for (int num : nums) {
+            prefixSum += num;
+            result = Math.max(result, prefixSum - minPrefix);
+            if (num < 0) {
+                if (prefixMap.containsKey((long) num)) {
+                    prefixMap.put(
+                            (long) num,
+                            Math.min(prefixMap.get((long) num), prefixMap.get(0L)) + num);
+                } else {
+                    prefixMap.put((long) num, prefixMap.get(0L) + num);
+                }
+                minPrefix = Math.min(minPrefix, prefixMap.get((long) num));
+            }
+            prefixMap.put(0L, Math.min(prefixMap.get(0L), prefixSum));
+            minPrefix = Math.min(minPrefix, prefixMap.get(0L));
+        }
+
+        return result;
+    }
+}

src/main/java/g3401_3500/s3410_maximize_subarray_sum_after_removing_all_occurrences_of_one_element/readme.md

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+3410\. Maximize Subarray Sum After Removing All Occurrences of One Element
+
+Hard
+
+You are given an integer array `nums`.
+
+You can do the following operation on the array **at most** once:
+
+*   Choose **any** integer `x` such that `nums` remains **non-empty** on removing all occurrences of `x`.
+*   Remove **all** occurrences of `x` from the array.
+
+Return the **maximum** subarray sum across **all** possible resulting arrays.
+
+A **subarray** is a contiguous **non-empty** sequence of elements within an array.
+
+**Example 1:**
+
+**Input:** nums = [-3,2,-2,-1,3,-2,3]
+
+**Output:** 7
+
+**Explanation:**
+
+We can have the following arrays after at most one operation:
+
+*   The original array is <code>nums = [-3, 2, -2, -1, <ins>**3, -2, 3**</ins>]</code>. The maximum subarray sum is `3 + (-2) + 3 = 4`.
+*   Deleting all occurences of `x = -3` results in <code>nums = [2, -2, -1, **<ins>3, -2, 3</ins>**]</code>. The maximum subarray sum is `3 + (-2) + 3 = 4`.
+*   Deleting all occurences of `x = -2` results in <code>nums = [-3, **<ins>2, -1, 3, 3</ins>**]</code>. The maximum subarray sum is `2 + (-1) + 3 + 3 = 7`.
+*   Deleting all occurences of `x = -1` results in <code>nums = [-3, 2, -2, **<ins>3, -2, 3</ins>**]</code>. The maximum subarray sum is `3 + (-2) + 3 = 4`.
+*   Deleting all occurences of `x = 3` results in <code>nums = [-3, <ins>**2**</ins>, -2, -1, -2]</code>. The maximum subarray sum is 2.
+
+The output is `max(4, 4, 7, 4, 2) = 7`.
+
+**Example 2:**
+
+**Input:** nums = [1,2,3,4]
+
+**Output:** 10
+
+**Explanation:**
+
+It is optimal to not perform any operations.
+
+**Constraints:**
+
+*   <code>1 <= nums.length <= 10<sup>5</sup></code>
+*   <code>-10<sup>6</sup> <= nums[i] <= 10<sup>6</sup></code>