Given a stringsand a dictionary of wordsdict, determine ifscan be segmented into a space-separated sequence of one or more dictionary words.For exampl...
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其他好文 时间：
2014-11-23 17:13:25
阅读次数：
203
【Add words to your picture】 How to add text to your photo, and then style it with theTypetool. 1、Open a photo。 File > Open. 打开一个图片/PSD文件。 2、Crea...
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其他好文 时间：
2014-11-23 11:44:27
阅读次数：
244
Substring with Concatenation of All WordsYou are given a string, S, and a list of words, L, that are all of the same length. Find all starting indices...
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其他好文 时间：
2014-11-22 08:08:34
阅读次数：
207
Description
Andy, 8, has a dream - he wants to produce his very own dictionary. This is not an easy task for him, as the number of words that he knows is, well, not quite enough. Instead of think...
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其他好文 时间：
2014-11-20 23:50:12
阅读次数：
354
Given an input string, reverse the string word by word.For example,Given s = "the sky is blue",return "blue is sky the".click to show clarification.Cl...
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其他好文 时间：
2014-11-20 11:53:36
阅读次数：
206
$$\bex \frac{\tan x}{x}\nearrow. \eex$$ Ref. [Proof Without Words: Monotonicity of $\tan x/x$ on $(0,\pi/2)$, The College Mathematics Journal].
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其他好文 时间：
2014-11-19 12:27:16
阅读次数：
180
$$\bex \sqrt{x^2+x+1}+ \sqrt{y^2+y+1} +\sqrt{x^2-x+1}+ \sqrt{y^2-y+1}\geq 2(x+y). \eex$$ Ref. [Proof Without Words: An Algebraic Inequality, The Colle...
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其他好文 时间：
2014-11-19 12:20:04
阅读次数：
126
$$\bex \sin(x+y)=\sin x\cos y+\cos x\sin y. \eex$$ Ref. [Proof Without Words: Sine Sum Identity, The College Mathematics Journal].
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其他好文 时间：
2014-11-19 12:19:11
阅读次数：
575
$$\bex \frac{\sin x}{x}\nearrow. \eex$$ Ref. [Proof Without Words: Monotonicity of $\sin x/x$ on $(0,\pi/2)$, The College Mathematics Journal]
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其他好文 时间：
2014-11-19 12:12:31
阅读次数：
152
设 $\sed{a_k}_{k=1}^n$ 为等差数列, 则 $$\bex a_1+\cdots+a_n=\frac{n(a_1+a_n)}{2}. \eex$$ Ref. [Proof Without Words: Partial Sums of an Arithmetic Sequence, T...
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其他好文 时间：
2014-11-19 12:04:39
阅读次数：
220
