Back to High School Physics

B - Back to High School Physics
Time Limit:3000MS     Memory Limit:0KB     64bit IO Format:%lld & %llu
Submit
 
Status
Description
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 0
5 12

Sample Output
0
120

　代码：

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
    int v,t;
    while(cin>>v>>t)
    {
        cout<<2*v*t<<endl;
    }
    return 0;
}