#include<stdio.h>
int main()
{
	int n=0,i=0,sum=0,a=0,b=0,c=0;
	while(scanf("%d",&n)&&n>0)
	{
		sum=0;
		c=0;
		for(i=0;i<n;i++)
		{
			scanf("%d%d",&a,&b);
			sum+=a*(b-c);
			c=b;
		}
		printf("%d miles\n",sum);
	}
}

• Re:这题真是我不想说了，长度堪比A+B (324) miklcct 2012-07-26 15:00:22