解题思路 动态规划 完整代码 x, y = map(int, input().split()) dp = [[1 for _ in range(y + 1)] for _ in range(x + 1)] for i in range(1, x + 1): for j in range(1, y + 1): dp[i][j] = dp[i - 1][j] + dp[i][j - 1] print(dp[-1][-1])