output_description: Print the maximum number of consecutive rainy days in the period.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      S
attempt: R, C, K = map(int, input().split(" "))
  board = [[0] * (C + 1) for _ in range(R + 1)]
  for _ in range(K):
      i, j, v = map(int, input().split(" "))
      board[i][j] = v
  
  score = [[[0] * 4 for _ in range(C + 1)] for _ in range(R + 1)]
  
  for i in range(1, R + 1):
      for j in range(1, C + 1):
          if board[i][j] == 0:
              for k in range(4):
                  score[i][j][k] = score[i][j - 1][k]
          else:
              for k in range(3):
                  score[i][j][k + 1] = score[i][j - 1][k] + board[i][j]
  
          descent = max(score[i - 1][j])
          score[i][j][1] = max(
              descent + board[i][j], score[i][j - 1][1], score[i][j - 1][0] + board[i][j]
          )
          score[i][j][0] = max(descent, score[i][j - 1][0])
  
  
  print(max(score[-1][-1]))
  
problem_description: Statement
  
  We have weather records at AtCoder Town for some consecutive three days. A
  string of length 3, S, represents the records - if the i-th character is `S`,
  it means it was sunny on the i-th day; if that character is `R`, it means it
  was rainy on that day.
  
  Find the maximum number of consecutive rainy days in this period.
samples: [{"input": "RRS", "output": "2\n    \n\nWe had rain on the 1-st and 2-nd days in the period. Here, the maximum number\nof consecutive rainy days is 2, so we should print 2.\n\n* * *"}, {"input": "SSS", "output": "0\n    \n\nIt was sunny throughout the period. We had no rainy days, so we should print\n0.\n\n* * *"}, {"input": "RSR", "output": "1\n    \n\nWe had rain on the 1-st and 3-rd days - two \"streaks\" of one rainy day, so we\nshould print 1."}]