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内置函数——eval、exec、compile
eval() 将字符串类型的代码执行并返回结果 exec()将自字符串类型的代码执行 compile 将字符串类型的代码编译。代码对象能够通过exec语句来执行或者eval()进行求值。 参数说明: 1. 参数source:字符串或者AST(Abstract Syntax Trees)对象。即需要动 ...
分类:其他好文   时间:2019-03-19 21:43:08    阅读次数:150
AVL树实现记录
"https://github.com/xieqing/avl tree" An AVL Tree Implementation In C There are several choices when implementing AVL trees: store height or balance f ...
分类:其他好文   时间:2019-03-17 23:13:54    阅读次数:128
[Stanford Algorithms: Design and Analysis, Part 2]
Specific topics in Part 2 include: greedy algorithms (scheduling, minimum spanning trees, clustering, Huffman codes), dynamic programming (knapsack, s ...
分类:其他好文   时间:2019-03-15 09:15:23    阅读次数:287
luogu Eat the Trees
```cpp / 用和模板类似的方法就行 但是实际上弱化版不用考虑匹配情况限制更加宽松, 只需要保存每个位置有无插头即可, / include include include include include include define ll long long define M 13 define ...
分类:其他好文   时间:2019-03-12 12:40:16    阅读次数:152
UVA699 UVALive5471 The Falling Leaves【树权和】
Each year, fall in the North Central region is accompanied by the brilliant colors of the leaves on the trees, followed quickly by the falling leaves ...
分类:其他好文   时间:2019-02-28 15:23:41    阅读次数:120
Json数组排序
语法:arraylist.sort(sortby); sortby:排序函数; 例子:st=[{"ID":15,"trees":2,"NodeNM":" 省属","isLeaf":1,"haveData":null,"行政区划":"4290","项目类型":null},{"ID":14,"trees ...
分类:编程语言   时间:2019-02-18 10:19:18    阅读次数:243
LeetCode 872 Leaf-Similar Trees 解题报告
题目要求 Consider all the leaves of a binary tree. From left to right order, the values of those leaves form a leaf value sequence. Two binary trees are c ...
分类:其他好文   时间:2019-02-17 11:15:34    阅读次数:185
树的遍历 | 相同的树
Given two binary trees, write a function to check if they are the same or not. Two binary trees are considered the same if they are structurally ident ...
分类:其他好文   时间:2019-02-14 22:19:34    阅读次数:204
Merge Two Binary Trees
Given two binary trees and imagine that when you put one of them to cover the other, some nodes of the two trees are overlapped while the others are n ...
分类:其他好文   时间:2019-02-14 15:05:23    阅读次数:168
HDU 2841-Visible Trees 【容斥】
<题目链接> 题目大意: 有一个农民,站在(0,0)点,从(1,1)点到(m,n)点每个点上有棵树,问这个农民能看到多少棵树。(如果多棵树在同一条直线上,那么他只能看到一颗) 解题分析: 因为农民站在(0,0)点,所以,我们根据图像分析可得,设树的坐标为(x,y),当gcd(x,y)=1,即树的横、 ...
分类:其他好文   时间:2019-02-10 09:16:24    阅读次数:166
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