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编译器正确,提交显示错误用动态数组做的,提交总是失败。汗。。。。。
#include<iostream>
using namespace std;
int main()
{
int n,i,sum;
cin>>n;
int *speed=new int[n];
int *time=new int[n];
for(i=0;i<n;i++)
{
cin>>speed[i];
cin>>time[i];
}
sum=time[0]*speed[0];
for(i=0;i<n-1;i++)
sum+=(time[i+1]-time[i])*speed[i+1];
cout<<sum<<" miles"<<endl;
return 0;
}
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