Suppose you have to evaluate an expression like ABCDE where A,B,C,D and E are matrices. Since matrix multiplication is associative, the order in which ...
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其他好文 时间:
2021-02-08 11:54:10
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Dr. Tuple is working on the new data-mining application for Advanced Commercial Merchandise Inc. One of the subroutines for this application works wit ...
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2021-02-02 11:09:22
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The computer company you work for is introducing a brand new computer line and is developing a new Unix-like operating system to be introduced along w ...
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2021-02-01 12:53:22
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? A common typing error is to place the hands on the keyboard one row to the right of the correct position. So ‘Q’ is typed as ‘W’ and ‘J’ is typed as ...
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2021-02-01 12:19:45
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? Some DNA sequences exist in circular forms as in the following figure, which shows a circular sequence “CGAGTCAGCT”, that is, the last symbol “T” in ...
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2021-02-01 12:18:46
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? Trung is bored with his mathematics homeworks. He takes a piece of chalk and starts writing a sequence of consecutive integers starting with 1 to N ...
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2021-02-01 12:17:16
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def select_sort_simple(li): li_new = [] for i in range(len(li)): min_val = min(li) li_new.append(min_val) li.remove(min_val) return li_new def select_ ...
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编程语言 时间:
2021-01-19 11:43:46
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题目描述 关于上面的指令,说明如下: move a onto b: a 和 b 都是木块号码,在把堆放在木块 a 和 b 上的所有木块归位到它们的初始位置后,再把木块 a 放到木块 b 上。 move a over b: a 和 b 都是木块号码,在把堆放在木块 a 上的所有木块归位到它们的初始位置 ...
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其他好文 时间:
2021-01-02 11:14:16
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【举一反三】: 剑指27.字符串的排列 ☆☆回溯算法入门级经典题目,理论讲解及分类习题:回溯算法入门级详解 + 练习(持续更新) 思路1:标记数组 思路2:交换位置。相比思路1,空间复杂度低。 class Solution { public List<List<Integer>> permute(i ...
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其他好文 时间:
2020-12-31 12:49:19
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UVA11613 Acme Corporation 思路 对于第$i$个月,货物来源有:当月生产(从源点流入),以及之前的月份流入。因为有保质期,这意味着第$i-1$个月留下来的货物里保质期会各不相同,可能其中一部分是第$i$个月就过期无法卖出的,这一部分货物显然不能流入第$i$个月。 如何连边才能 ...
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其他好文 时间:
2020-11-13 12:49:12
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