列表

详情


剑指 Offer 60. n个骰子的点数

把n个骰子扔在地上,所有骰子朝上一面的点数之和为s。输入n,打印出s的所有可能的值出现的概率。

 

你需要用一个浮点数数组返回答案,其中第 i 个元素代表这 n 个骰子所能掷出的点数集合中第 i 小的那个的概率。

 

示例 1:

输入: 1
输出: [0.16667,0.16667,0.16667,0.16667,0.16667,0.16667]

示例 2:

输入: 2
输出: [0.02778,0.05556,0.08333,0.11111,0.13889,0.16667,0.13889,0.11111,0.08333,0.05556,0.02778]

 

限制:

1 <= n <= 11

原站题解

去查看

上次编辑到这里,代码来自缓存 点击恢复默认模板
class Solution { public: vector<double> dicesProbability(int n) { } };

python3 解法, 执行用时: 32 ms, 内存消耗: 14.9 MB, 提交时间: 2022-11-13 14:09:15

class Solution:
    def dicesProbability(self, n: int) -> List[float]:
        dp = [1 / 6] * 6
        for i in range(2, n + 1):
            tmp = [0] * (5 * i + 1)
            for j in range(len(dp)):
                for k in range(6):
                    tmp[j + k] += dp[j] / 6
            dp = tmp
        return dp

上一题