From f2cbcaa0fb02a5989bd5ddcf5a3e52feaed33454 Mon Sep 17 00:00:00 2001
From: Sangeeth Sudheer <sangeeth96@users.noreply.github.com>
Date: Thu, 5 May 2022 07:52:58 +0530
Subject: [PATCH] max-number-of-k-sum-pairs py3

---
 1798_max-number-of-k-sum-pairs/README.md      | 30 +++++++++++++++++++
 .../python3/solution.py                       | 21 +++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 1798_max-number-of-k-sum-pairs/README.md
 create mode 100644 1798_max-number-of-k-sum-pairs/python3/solution.py

diff --git a/1798_max-number-of-k-sum-pairs/README.md b/1798_max-number-of-k-sum-pairs/README.md
new file mode 100644
index 0000000..01286c5
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+You are given an integer array `nums` and an integer `k`.
+
+In one operation, you can pick two numbers from the array whose sum equals `k` and remove them from the array.
+
+Return _the maximum number of operations you can perform on the array_.
+
+**Example 1:**
+
+    Input: nums = [1,2,3,4], k = 5
+    Output: 2
+    Explanation: Starting with nums = [1,2,3,4]:
+    - Remove numbers 1 and 4, then nums = [2,3]
+    - Remove numbers 2 and 3, then nums = []
+    There are no more pairs that sum up to 5, hence a total of 2 operations.
+
+**Example 2:**
+
+    Input: nums = [3,1,3,4,3], k = 6
+    Output: 1
+    Explanation: Starting with nums = [3,1,3,4,3]:
+    - Remove the first two 3's, then nums = [1,4,3]
+    There are no more pairs that sum up to 6, hence a total of 1 operation.
+
+**Constraints:**
+
+*   `1 <= nums.length <= 105`
+*   `1 <= nums[i] <= 109`
+*   `1 <= k <= 109`
+
+https://leetcode.com/problems/max-number-of-k-sum-pairs
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diff --git a/1798_max-number-of-k-sum-pairs/python3/solution.py b/1798_max-number-of-k-sum-pairs/python3/solution.py
new file mode 100644
index 0000000..4c46ff0
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+++ b/1798_max-number-of-k-sum-pairs/python3/solution.py
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+class Solution:
+    def maxOperations(self, nums: List[int], k: int) -> int:
+        nums.sort()
+        
+        left, right = 0, len(nums) - 1
+        
+        count = 0
+        while left < right:
+            total = nums[left] + nums[right]
+            
+            if total == k:
+                count += 1
+                left += 1
+                right -= 1
+            elif total < k:
+                left += 1
+            else:
+                right -= 1
+        
+        return count
+                
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