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908. Smallest Range I
Given an array A of integers, for each integer A[i] we may choose any x with K ...
分类:其他好文   时间:2018-10-21 13:06:02    阅读次数:87
[Javascript] Use JavaScript's for-in Loop on Objects with Prototypes
Loops can behave differently when objects have chained prototype objects. Let's see the difference we get when we use the for-in loop on an object wit ...
分类:编程语言   时间:2018-10-19 20:16:29    阅读次数:185
Difference between Process and thread?
What are the differences between a process and a thread? How are they similar? How can 2 threads communicate? How can 2 process communicate? Both proc ...
分类:其他好文   时间:2018-10-18 10:54:59    阅读次数:197
744. Find Smallest Letter Greater Than Target
Given a list of sorted characters letterscontaining only lowercase letters, and given a target letter target, find the smallest element in the list th ...
分类:其他好文   时间:2018-10-18 01:17:00    阅读次数:132
HDU - 5936: Difference(中途相遇法)
Little Ruins is playing a number game, first he chooses two positive integers yy and KK and calculates f(y,K)f(y,K), here f(y,K)=∑z in every digits of ...
分类:其他好文   时间:2018-10-17 00:21:39    阅读次数:237
LeetCode 910. Smallest Range II
很有意思的一道数学推理题目, 剪枝以后解法也很简洁。初看貌似需要把每个数跟其他数作比较。但排序以后可以发现情况大大简化:对于任一对元素a[i] < a[j], a[i] - k和a[j] + k 的情况可以排除, 因为会产生比原值更大的差, 所以对于原有数组的最小值min最大值max, (min - ...
分类:其他好文   时间:2018-10-15 14:33:35    阅读次数:191
集合操作
1、特性:把两ist中相同的值去重、关系测试:测试两组数据差集、交集、并集等关系。 2、工厂函数:col=set() 3、取交集:set1.intersection(set2) 差集:set1.difference(set2) 并集:set1.union(set2)可求出在set1存在的而set2没 ...
分类:其他好文   时间:2018-10-14 02:02:22    阅读次数:158
Codeforces Round #514 (Div. 2) D. Nature Reserve
http://codeforces.com/contest/1059/problem/D 最大值: 最左下方和最右下方分别有一个点 r^2 - (r-1)^2 = (10^7)^2 maxr<0.5*10^14 Way1: 二分。 difference: 如果使用 5*10^13 -> 10^-6, ...
分类:其他好文   时间:2018-10-14 00:25:32    阅读次数:144
关于limit_req和limit_conn的区别
1,首先,limit_req和limit_conn两个模块都是为了来限流的,但是两者不在一个层面,为了搞清楚这个,必须先要弄清楚request和connection的区别,因为在很多情况下,我们把他们混淆了。 so, what is the difference between connection ...
分类:其他好文   时间:2018-10-11 12:57:51    阅读次数:316
hackerrank刷题总结
1.You are given a table, Projects, containing three columns: Task_ID, Start_Date and End_Date. It is guaranteed that the difference between the End_Da ...
分类:其他好文   时间:2018-10-08 23:20:58    阅读次数:2590
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