Input:standard input
Output:standard output
A particle has initial velocity and constant acceleration. If its velocity after certain time is v then what will its displacement be in twice of that time?
Input
The input will contain two integers in each line. Each line makes one set of input. These two integers denote the value of v (-100 <= v <= 100) and t(0<=t<= 200) ( t means at the time the particle gains that velocity)
Output
For each line of input print a single integer in one line denoting the displacement in double of that time.
Sample Input
0 05 12
Sample Output
0120
#include<stdio.h>int main(){ long v,t; while(scanf(“%ld%ld”,&v,&t)==2)printf(“%ld\n”,2*v*t);return 0;}
这题主要是根据物理知识，香港服务器，美国服务器，s=2vt。还有就是要注意scanf的返回值是2.
，美国服务器人生没有彩排，每天都是现场直播。
