jswwsj

未归档

cf(15) dfs(1) zoj(6) 并查集(2) 快速幂(1) 思维(2) 搜索(1) 最短路(2) 模拟(1) 追求(1) 题解(3)

/ 注册

全部文章 / 未归档（共27篇）

华为云使用心得

第一次使用华为云，根据习惯安装的CentOS 6.5，支持一下国货准备，可有一点要吐槽一下，不能随便更新Linux内核，然后是各种折腾，想用yum安装postgresql，添加源后yum update执行，yes一点，等安装完配置好其他的软件，发现数据库远程怎么也连接不上，SSH倒是正常，FTP也正...

2019-11-04

2 592

Codeforces Round #568 (Div. 2) D. Extra Element

A sequence a1,a2,…,ak is called an arithmetic progression if for each i from 1 to k elements satisfy the condition ai=a1+c⋅(i−1) for some fixed c . ...

2019-06-20

1 578

ACM 国际大学生程序设计竞赛简介

ACM简介 ACM（国际计算机学会）是一家科教性质的协会，旨在联合全球计算 IBM的承诺机领域的教学人员、研究人员和从业人员，开展行业交流活动、共享资源和解决业界难题。凭借绝对的领导地位，ACM始终致力于推行最高行业标准，表彰杰出技术人才，加强计算机行业的整体队伍建设。ACM通过为成员提供...

2019-06-18

6 16655

Codeforces Round #567 (Div. 2) B. Split a Number

time limit per test 2 seconds memory limit per test 512 megabytes input standard input output standard output Dima worked all day and wrote do...

2019-06-16

0 714

Codeforces Round #567 (Div. 2) A. Chunga-Changa

time limit per test 1 second memory limit per test 512 megabytes input standard input output standard output Soon after the Chunga-Changa isla...

2019-06-16

0 624

博主简介

大一在读，acmer菜鸟一只，虽然菜，但我会在acm的路上一直走下去。

2019-06-05

0 519

Codeforces Round #563 (Div. 2) C - Ehab and a Special Coloring Problem

You're given an integer n. For every integer i from 2 to n, assign a positive integer ai such that the following conditions hold: For any pair of ...

2019-06-04

0 633

Codeforces Round #563 (Div. 2) B Ehab Is an Odd Person

You're given an array a of length n . You can perform the following operation on it as many times as you want: Pick two integers i and j (1≤i,j≤...

2019-06-04

0 617

Codeforces Round #563 (Div. 2) A Ehab Fails to Be Thanos

You're given an array a of length 2n. Is it possible to reorder it in such way so that the sum of the first n elements isn't equal to the sum of the ...

2019-06-04

0 810

牛牛的幂运算

题目描述牛牛在做一道数学题，他发现自己不怎么会做，请你帮帮他求有多少a,b,c,d满足a^b = c^d， 1<=a,b,c,d<=n, 模 10^9+7 输入描述: 输入一个整数n (1 ≤ n ≤ 109) 输出描述: 输出一个整数示例1 输...

2019-05-29

0 551