题意: 有个人在蹦极,给出悬崖的高度,绳子的长度,弹簧绳的胡克系数 以及 人的质量. 判断人是否能够着地,能的话是否能安全着地.所谓安全着地就是到达地面的速度不超过10m/s. 分析: 学过一点高中物理的就应该能解出来吧,既然是题解还是本着详细具体的原则来写. 首先要求人能下落的最大高度,也就是重力做的功全部转化为弹簧绳的弹性势能. ,解出Δl: 那么人能下落的最大高度就是l + Δl 如果人能落地,还要看绳长l与悬崖高度s的关系 l>=s,则重力做的功全部转换为动能,,解得 l<s,重力做的…

这道题看起来很长,而实际上就是考物理 可以用动能定理来算出末速度. 同时注意要特判绳子比桥还长的情况. #include<cstdio> #include<cmath> #define REP(i, a, b) for(int i = (a); i < (b); i++) using namespace std; int main() { double k, l, s, w; while(~scanf("%lf%lf%lf%lf", &k, &am…

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…

http://acm.hdu.edu.cn/showproblem.php?pid=1155 Bungee Jumping Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 811    Accepted Submission(s): 349 Problem Description Once again, James Bond is fle…

Bungee JumpingTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 1205 Accepted Submission(s): 528 Problem DescriptionOnce again, James Bond is fleeing from some evil people who want to see him dead. F…

Problem Description Once again, James Bond is fleeing from some evil people who want to see him dead. Fortunately, he has left a bungee rope on a nearby highway bridge which he can use to escape from his enemies. His plan is to attach one end of the…

链接: http://acm.hdu.edu.cn/showproblem.php?pid=1155 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 793    Accepted Submission(s): 342 Problem Description Once again, James Bond is fleeing from s…

题目大意:给出k:绳子的劲度系数,l:绳长,s:桥高,w:邦德的质量,g取9.81.绳子弹力=形变量*劲度系数.如果落地速度大于10 则摔死,小于0则飘着空中. 题目思路:根据能量守恒得知:落地的动能=重力势能减少量-绳子弹力做功.如果l>s,则绳子不做功. #include<cstdio> #include<stdio.h> #include<cstdlib> #include<cmath> #include<iostream> #inc…

A:HDU 1060 Leftmost Digit(求N^N的第一位数字 log10的巧妙使用) B:(还需要研究一下.....) C:HDU 1071 The area(求三个点确定的抛物线的面积,其中一个点是顶点) D:HDU 1077 Catching Fish(用单位圆尽可能围住多的点) E:HDU 1099 Lottery (求数学期望) F:HDU 1110 Equipment Box (判断一个大矩形里面能不能放小矩形) G:HDU 1155 Bungee Jumping(物理题,…

各种杂题,水题,模拟,包括简单数论. 1001 A+B 1002 A+B+C 1009 Fat Cat 1010 The Angle 1011 Unix ls 1012 Decoding Task 1019 Grandpa's Other Estate 1034 Simple Arithmetics 1036 Complete the sequence! 1043 Maya Calendar 1054 Game Prediction 1057 Mileage Bank 1067 Rails 10…