[题意概述] 某个物体要从A途经B到达C,在通过B的时候速度不能超过vd.  它的加速度为a,最大速度为vm:AB之间距离为d,AC之间距离为L: 问物体最少花多少时间到达C. [题解] 分情况讨论. 若物体一直加速,通过B之前速度已经超过了vd,那么显然物体必须先加速后减速才能保证通过B是速度为vd. 先加速后减速也分为两种情况:加速后立即减速.加速后保持最大速度vm一段时间后再减速. 通过了B之后物体从速度vd一直加速,直至到达C或者达到最大速度vm. 若物体无法在通过B之前达到vd,那么显…

D. Follow Traffic Rules 题目连接: http://www.codeforces.com/contest/5/problem/D Description Everybody knows that the capital of Berland is connected to Bercouver (the Olympic capital) by a direct road. To improve the road's traffic capacity, there was pl…

D. Follow Traffic Rules time limit per test 1 second memory limit per test 64 megabytes input standard input output standard output Everybody knows that the capital of Berland is connected to Bercouver (the Olympic capital) by a direct road. To impro…

[题目链接]:http://codeforces.com/problemset/problem/29/B [题意] 一辆车; 让从A开到B; 然后速度是v; (只有在信号灯前面才能停下来..否则其他时候只能维持v的速度) (如果在红绿灯前,刚好从绿灯变成红灯,不能走,但如果从红灯变成绿灯,则可以走) 告诉你A到信号灯的距离l,以及A.B之间距离d; 以及绿灯红灯交替的时间;g和r; 问你从A到B需要花费多少时间; [题解] 一开始ans=d/v; 看看到达信号灯的时间是不是整数; 不是整数的话;…

C. Tennis Championship 题目链接 http://codeforces.com/contest/735/problem/C 题面 Famous Brazil city Rio de Janeiro holds a tennis tournament and Ostap Bender doesn't want to miss this event. There will be n players participating, and the tournament will fo…

time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output Famous Brazil city Rio de Janeiro holds a tennis tournament and Ostap Bender doesn't want to miss this event. There will be n players participat…

Traffic Lights time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output A car moves from point A to point B at speed v meters per second. The action takes place on the X-axis. At the distance d met…

C. Tennis Championship time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Famous Brazil city Rio de Janeiro holds a tennis tournament and Ostap Bender doesn't want to miss this event. There w…

B. Painting The Wall time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output User ainta decided to paint a wall. The wall consists of n2 tiles, that are arranged in an n × n table. Some tiles are p…

Problem A: A. Rewards time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Bizon the Champion is called the Champion for a reason. Bizon the Champion has recently got a present - a new glass cup…