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动态规划,其实就是把问题分解成子问题,利用子问题的解结合推算出问题的解。
以斐波那契数列来说,fib(3) = fib(2) + fib(1)
如果自顶向下的去写,难免会用到递归,开很多个函数调用栈非常容易爆栈。
动态规划的思想有点类似于备忘录,但它是自底向上的,先求 f(1)、f(2)、再利用它们去计算出 f(3)。
求解的数字是 N,那就从 0-N 先把结果计算好,最后…
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ERRORS:
> $ pwd
/c/CODE/repos/cisco-product-apis/restconf/**yang/vendor/cisco/xe/16111**
$ pyang -f tree ietf-ipv4-unicast-routing.yang
ietf-ipv4-unicast-routing.yang:**104**: error: node ietf-r…
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**Welcome!** Please use this template for reporting documentation issues on https://developers.google.com/web/.
_For questions about **Chrome DevTools**, checkout the
[`google-chrome-devtools`](ht…
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| | |
|------------------|-----------------|
|Previous ID | SR-8880 |
|Radar | rdar://problem/44910022 |
|Original Repor…
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There is currently no way of clearing the cache (except through manually deleting files in that directory), which means that it could get rather large after a while.
Possible solution is to have a …
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Recently, I encountered a same issue mentioned here related to dead lock https://github.com/PyO3/pyo3/pull/3540#issuecomment-1789623562
Here I use the `par_stream` crate to provide a parallel async…
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斐波那契数,通常用 F(n) 表示,形成的序列称为 斐波那契数列 。该数列由 0 和 1 开始,后面的每一项数字都是前面两项数字的和。也就是:
F(0) = 0,F(1) = 1
F(n) = F(n - 1) + F(n - 2),其中 n > 1
示例 1:
输入:2
输出:1
解释:F(2) = F(1) + F(0) = 1 + 0 = 1
示例 2:
输入…
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```scheme
(letrec ((even?
(lambda (n)
(if (zero? n)
#t
(odd? (- n 1)))))
(odd?
(lambda (n)
(if (zero? n)
…
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## Fibonacci Numbers
[[How to read this blog post]](https://github.com/jdan/j/issues/1)
```ijs
NB. We start our sequence with the pair 0 1
0 1
NB. 0 1
NB. To shift our pair up one step, we…
jdan updated
10 months ago
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```
import 'ffi'
macro zig = (code)->
import 'md5'
dir, fn = 'embed/', md5.sumhexa(code) -- without ext (.zig/.h/.so)
with io.open(dir..fn..'.zig', 'w')
\write(code)
\close()
cmd =…