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RSS订阅原创 ICPC North Central NA Contest 2020 I. Staggering to the Finish
ICPC North Central NA Contest 2020I. Staggering to the Finish题目描述An oval track and field racing track consists of two parallel straightaway sections connected by two semicircles,depicted in figure 1. Footraces run in the counterclockwise direction, endi
2021-08-30 22:52:41
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原创 STL练习 (string, map, vector, sort)
Anagrams (II)时间限制: 1 Sec 内存限制: 128 MB题目描述One of the preferred kinds of entertainment of people living in final stages of XX century is filling in the crosswords. Almost every newspaper and magazine has a column dedicated to entertainment but only amate
2021-01-29 12:51:08
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原创 STL练习(vector, string, map, sort)
问题 D: Ananagrams时间限制: 1 Sec 内存限制: 128 MB题目描述Most crossword puzzle fans are used to anagrams — groups of words with the same letters in different orders — for example OPTS, SPOT, STOP, POTS and POST. Some words however do not have this attribute, no mat
2021-01-28 14:28:00
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原创 垃圾键盘(bushi) (悲剧文本)
问题 B: Broken Keyboard时间限制: 1 Sec 内存限制: 128 MB题目描述You’re typing a long text with a broken keyboard. Well it’s not so badly broken. The only problem with the keyboard is that sometimes the “home” key or the “end” key gets automatically pressed (internall
2021-01-28 13:01:40
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原创 产生数 (DFS + 高精度)
问题 C: 产生数时间限制: 1 Sec 内存限制: 128 MB题目描述给出一个整数 n（n<10^30) 和 k 个变换规则（k<=15）。规则：一位数可变换成另一个一位数：规则的右部不能为零。例如：n=234。有规则（k＝2）：2－> 53－> 6上面的整数 234 经过变换后可能产生出的整数为（包括原数）:234534264564共 4 种不同的产生数问题：给出一个整数 n 和 k 个规则。求出：经过任意次的变换（0次或多次），能产生出
2021-01-24 18:30:34
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原创 n皇后问题C++ 详解
#pragma comment(linker, "/STACK:102400000,102400000")#pragma GCC optimize(3, "Ofast", "inline")#pragma GCC optimize(2)#include <bits/stdc++.h>#define RE register int#define INF 0x3f3f3f3f#define EPS 1e-8using namespace std;typedef unsigned lo
2021-01-19 12:49:25
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原创 BFS+枚举
14976: 绿纹龙的森林游记时间限制: 1 Sec 内存限制: 128 MB题目描述暑假来了，绿纹龙很高兴。于是飘飘乎就来到了森林一日游。可是他却看到了很不和谐的一幕，一群猎人在森林里围捕小动物。森林可以看做是一个10*10的方格，如下图所示，1表示猎人，0表示小动物。已知猎人保持不动，而小动物可以往上下左右任意方向逃脱（当然不能撞上猎人）。小动物可以逃出森林。但上图背景色被标红的那部分小动物将永远无法逃脱猎人的魔爪。输入一个10*10的矩阵，描述森林中猎人和小动物分布的情况。保证每个点
2020-11-29 17:23:32
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原创 求公共区间
14383: Prison时间限制: 1 Sec 内存限制: 128 MB题目描述We have N ID cards, and there are M gates.We can pass the i-th gate if we have one of the following ID cards: the Li-th, (Li+1)-th, …, and Ri-th ID cards.How many of the ID cards allow us to pass all the gates
2020-11-17 20:05:30
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原创 1127：Password Passes
1127: Password Passes//水题时间限制: 1 Sec 内存限制: 64 MB题目描述Student at ACME University are required to change passwords to their email accounts every year. Each new password must satisfy the following:The password must contain only alphanumeric characters (c
2020-10-25 21:03:41
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