UVa 10071 - Back to High School Physics

题目链接http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=24&page=show_problem&problem=1012

不解释

#include"stdio.h" 

int main()
{
int v,t;
while(scanf("%d %d", &v,&t) != EOF)
printf("%d\n", 2*v*t);
return 0;
}