1499. Max Value of Equation

class Solution:
    def findMaxValueOfEquation(self, points: List[List[int]], k: int) -> int:
        max_val = float('-inf')
        heap = []
        for i in range(len(points)):
            while len(heap) > 0 and abs(heap[0][1] - points[i][0]) > k:
                heapq.heappop(heap)
            if len(heap) > 0:
                max_val = max(max_val, -heap[0][0] + points[i][0] + points[i][1])
            heapq.heappush(heap,(-points[i][1]+points[i][0], points[i][0]))
        return max_val