physics 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5826 Description There are n balls on a smooth horizontal straight track. The track can be considered to be a number line. The balls can be considered to be particles with the same mass. At the…

 physics(物理) Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)   Description 题目描述 There are n balls on a smooth horizontal straight track. The track can be considered to be a number line. The balls can be considered…

physics 题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5826 Description There are n balls on a smooth horizontal straight track. The track can be considered to be a number line. The balls can be considered to be particles with the same mass. At the…

physics Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 817    Accepted Submission(s): 454 Problem Description There are n balls on a smooth horizontal straight track. The track can be considere…

该问题和xi,di均无关,碰撞只会使得速度反向,大小不会变.因此只要计算速度. #pragma comment(linker, "/STACK:1024000000,1024000000") #include<cstdio> #include<cstring> #include<cmath> #include<algorithm> #include<vector> #include<map> #include<…

Rower Bo 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5761 Description There is a river on the Cartesian coordinate system,the river is flowing along the x-axis direction. Rower Bo is placed at (0,a) at first.He wants to get to origin (0,0) by boa…

http://acm.hdu.edu.cn/showproblem.php?pid=5066 中学物理题 #include <cstdio> #include <cstdlib> #include <cmath> #include <cstring> #include <string> #include <queue> #include <map> #include <iostream> #include &l…

题意: 给你N个炮弹的发射速度,以及炮台高度H和L1,R1,L2,R2. 问任选发射角度.最多能有几个炮弹在不打入L2~R2的情况下打入L1~R1 注意:区间有可能重叠. 思路: 物理题,发现单纯的依据V去求X很困难. 这个时候想到暴力枚举角度.for(double i=0; i<=pi; i+=0.0007) 算出能到达的x.然后推断x,统计sum 发现以增长级0.0007弧度 刚刚好能过这道题 反正也是醉了~ 代码: #include"cstdlib" #include&qu…

传送门: Bungee Jumping Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 1718    Accepted Submission(s): 729 Problem Description Once again, James Bond is fleeing from some evil people who want to se…

A. Wizards and Trolleybuses Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/167/problem/A Description In some country live wizards. They love to ride trolleybuses. A city in this country has a trolleybus depot with n trolle…