帖子def getMaximumSum(matrix, k):

def getMaximumSum(matrix, k): global idx import heapq from collections import deque n = len(matrix) rows = [deque(row) for row in matrix] heap = [] for i in range(n): if rows[i]: heapq.heappush(heap, (-rows[i][0], i, True)) heapq.heappush(heap, (-rows[i][-1], i, False)) ans= 0 for _ in range(k): while heap: val, idx, is_left = heapq.heappop(heap) if rows[idx]: if is_left and rows[idx][0] == -val: ans += rows[idx].popleft() break elif not is_left and rows[idx][-1] == -val: ans += rows[idx].pop() break if rows[idx]: heapq.heappush(heap, (-rows[idx][0], idx, True)) heapq.heappush(heap, (-rows[idx][-1], idx, False)) return ans getMaximumSum✅✅ CISCO✅