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这道题可以不用数组——附代码

Posted by rubbishMD at 2016-04-20 22:08:06 on Problem 2017
#include<iostream>
using namespace std;
int main(){
	int a,b,tot,n,last;
	cin>>n;
	while(n!=-1)
	{
		last=tot=0;
		for(int i=0;i<n;i++)
		{
			cin>>a>>b;
			tot=tot+(b-last)*a;
			last=b;
		}
		cout<<tot<<" miles"<<endl;
		cin>>n;
	}
	return 0;
}

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