第十个点RE了。下载了数据本机没问题。
将cmp里的<=号该成<号就对了,这是为何... ...
RE代码:
#include <iostream>
#include <cstdio>
#include <algorithm>
using namespace std;
#define int long long
const int N=100005;
struct A {int t,d;} a[N];
int n,sum,ans;
bool cmp(A x,A y) {return x.t*y.d<=y.t*x.d;}
signed main()
{
cin>>n;
for(int i=1;i<=n;i++) {
scanf("%lld%lld",&a[i].t,&a[i].d);
sum+=a[i].d;
}
sort(a+1,a+1+n,cmp);
for(int i=1;i<=n;i++) {
sum-=a[i].d;
ans+=sum*2*a[i].t;
}
cout<<ans;
return 0;
}