1. Maximum Subarray Sum Problem Statement Given an array of integers, determine the maximum possible sum of any contiguous subarray within the array. Example: Input: array = [34, -50, 42, 14, -5, 86] Output: 137 Explanation: The maximum sum is achieved by the subarray [42, 14, -5, 86]. Input: array = [-5, -1, -8, -9] Output: -1 Explanation: The maximum sum is -1, achieved by the subarray [-1]. Constraints: 1 ≤ N ≤ 106, where N is the number of elements in the array. -104 ≤ array[i] ≤ 104 Note: The solution should have a time complexity of O(N). Input: The first line contains a single integer, N, the size of the array. The second line contains N space-separated integers representing the elements of the array. Output: A single integer, the maximum subarray sum.

2. Mean, Median, and Mode Problem Statement Given an integer array ARR of size N, you need to compute the following three statistical measures: Mean: Implement the function mean() to calculate the mean of the array. Median: Implement the function median() to calculate the median of the array. Mode: Implement the function mode() to determine the mode of the array. Return these measures in the specified format. Example: Input: ARR = {1, 1, 2, 2, 3, 3, 4} Output: Mean: P QMedian: P QMode: 1 Explanation: For the given array, the mode will be 1, as it is the smallest of all the possible modes (1, 2, and 3). Constraints: 1 <= T <= 5 1 <= N <= 105 1 <= ARR[i] <= 106 Where ARR[i] denotes the ith element of the array. Time limit: 1 sec Note: Mean and Median should be returned in the form P/Q, where P and Q are coprime integers, and Q ≠ 0. If multiple elements have the same highest frequency, return the smallest one as the mode.

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