You are given two positive integers n and limit.
Return the total number of ways to distribute n candies among 3 children such that no child gets more than limit candies.
\n
Example 1:
\n\n\nInput: n = 5, limit = 2\nOutput: 3\nExplanation: There are 3 ways to distribute 5 candies such that no child gets more than 2 candies: (1, 2, 2), (2, 1, 2) and (2, 2, 1).\n\n\n
Example 2:
\n\n\nInput: n = 3, limit = 3\nOutput: 10\nExplanation: There are 10 ways to distribute 3 candies such that no child gets more than 3 candies: (0, 0, 3), (0, 1, 2), (0, 2, 1), (0, 3, 0), (1, 0, 2), (1, 1, 1), (1, 2, 0), (2, 0, 1), (2, 1, 0) and (3, 0, 0).\n\n\n
\n
Constraints:
\n\n1 <= n <= 501 <= limit <= 50给你两个正整数 n 和 limit 。
请你将 n 颗糖果分给 3 位小朋友，确保没有任何小朋友得到超过 limit 颗糖果，请你返回满足此条件下的 总方案数 。
\n\n
示例 1：
\n\n\n输入：n = 5, limit = 2\n输出：3\n解释：总共有 3 种方法分配 5 颗糖果，且每位小朋友的糖果数不超过 2 ：(1, 2, 2) ，(2, 1, 2) 和 (2, 2, 1) 。\n\n\n
示例 2：
\n\n\n输入：n = 3, limit = 3\n输出：10\n解释：总共有 10 种方法分配 3 颗糖果，且每位小朋友的糖果数不超过 3 ：(0, 0, 3) ，(0, 1, 2) ，(0, 2, 1) ，(0, 3, 0) ，(1, 0, 2) ，(1, 1, 1) ，(1, 2, 0) ，(2, 0, 1) ，(2, 1, 0) 和 (3, 0, 0) 。\n\n\n
\n\n
提示：
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