先估算这个数小于3的50次方
cnt=0
for i in range(50):
for j in range(50):
for k in range(50):
a=3**i
b=5**j
c=7**k
if a*b*c<=59084709587505:
cnt+=1
print(cnt-1)#当ijk都为0时，a*b*c=1不是幸运数字所以要减去
![[<span style='color:red;'>蓝</span><span style='color:red;'>桥</span><span style='color:red;'>杯</span>]真<span style='color:red;'>题</span>讲解：数三角（<span style='color:red;'>枚</span><span style='color:red;'>举</span>+STL）](https://img-blog.csdnimg.cn/direct/27129fb34d6a405bbb527ec6d2253fa9.png)
![【洛谷 P8695】[<span style='color:red;'>蓝</span><span style='color:red;'>桥</span><span style='color:red;'>杯</span> 2019 国 AC] 轨道炮 题解（映射+模拟+<span style='color:red;'>暴力</span><span style='color:red;'>枚</span><span style='color:red;'>举</span>+桶排序）](https://img-blog.csdnimg.cn/direct/80a460261d8045a1be53c602862ec9c3.png)
![[Rust开发]用可视化案例讲Rust编程6.动态分发与最终封装](https://img-blog.csdnimg.cn/img_convert/eaf4cbde0de964d3454819f838f01d22.jpeg)
