UVaOJ10071 Back to High School Physics

初速度与加速度恒定，已知经 t 时间后速度为 v， 求经 2t 后位移为多少？

/*10071 - Back to High School Physics*/
# include <stdio.h>
int main()
{
    int v0, t;
    while (scanf("%d%d", &v0, &t)!=EOF)
        printf("%d\n",2*v0*t);
    return 0;
}