#include<iostream>
using namespace std;
int main()
{
	int n=0;int a[11][3];int sum=0,d=0;
do{
	cin>>n;
	if(n!=-1){
for(int j=1;j<=n;j++)
{

		cin>>a[j][1]
			>>a[j][2];

}for(j=2;j<=n;j++)
{d=a[1][1]*a[1][2];
	sum=sum+a[j][1]*(a[j][2]-a[j-1][2]);
}
cout<<sum+d<<" "<<"miles"<<endl;
sum=0;
	}}while(n!=-1);
return 0;
}

• Re:我的为什么老是wrong answer (387) cuiwj871128 2008-10-26 15:13:46