Back to High School Physics
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 0
5 12
Sample Output
0
120
关于这道题，我只想说，我物理不好，英语不好。。。
#include<iostream>
using namespace std;
int main()
{
int a,b;
while(cin>>a>>b)
{
cout<<2*a*b<<endl;
}
return 0;
}