$ cat ./coding/561-array-partition.md

────────────────────────────────────────────────────────────

561. Array Partition

class Solution:
    def arrayPairSum(self, nums: List[int]) -> int:
        nums.sort()
        
        res = 0
        i = 0
        
        while i < len(nums):
            res += nums[i]
            i += 2
            
        return res

$ ls ./coding/ | grep -v 561-array-partition