蓝桥杯--答疑

https://www.lanqiao.cn/problems/1025/learning/?contest_id=55

 1 #include
 2 using namespace std;
 3 #include
 4 int main()
 5 {   int n;
 6     scanf("%d",&n);
 7     int s[n],a[n],e[n],sum[n];
 8     long long int ans=0;
 9     for(int i=0;i)
10         scanf("%d %d %d",&s[i],&a[i],&e[i]);
11     for(int i=0;i){
12         sum[i]=s[i]+a[i]+e[i];
13     }
14         sort(sum,sum+n);
15     for(int i=0;i){
16      ans=ans+((n-i)*sum[i]-e[i]);
17     }
18     printf("%lld",ans);
19 }