set就是数学上的集合——每个元素最多只出现一次,和sort一样,自定义类型也可以构造set,但同样必须定义“小于”运算符 以下代码测试set中无重复元素 #include<iostream> #include<iterator> #include<set> using namespace std; typedef long long LL; ]={,,}; int main() { set<LL>s; s.insert(); s.insert(); s.i…
Description Andy, , 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 thinking up all the words himself, he has a briliant idea. Fr…
Description Andy, , 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 thinking up all the words himself, he has a briliant idea. Fr…
输入一个文本,找出所有不同的单词(连续的字母序列),按字典序从小到大输出.单 词不区分大小写. 样例输入: Adventures in Disneyland Two blondes were going to Disneyland when they came to a fork in the road. The sign read: "Disneyland Left." So they went home. 样例输出(为了节约篇幅只保留前5行): a adventures blond…
# 下面结果执行一次不容易出差距,所以都执行100000次 import time dict1 = {'a':1, 'b':2, 'c':3, 'd':4} # 第一种:字典推导式 start_time = time.time() for i in range(100000): d1 = {key:value for key,value in dict1.items() if value>2} print('运行时间: {}'.format(time.time() - start_time))…