感谢携程三道medium,在动辄hard,acm题的笔试里面简直一股清流 第一题最大方阵和: 思路:二维前缀和 x = input().split() x = list(map(int,x)) n,m,k = x[0],x[1],x[2] matrix = [] for _ in range(n): x = input().split() x = list(map(int,x)) matrix.append(x) res = 0 prefix = [[0] * (m+1) for _ in range(n+1)] for i in range(1,n+...