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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. void solve(){
  5.     int n;cin>>n;
  6.     vector<int>a(n),b(n),diff(n);
  7.     long long c=0;
  8.     for(int i=0;i<n;i++){
  9.         cin>>a[i]>>b[i];
  10.         c+=(long long)b[i]*n-a[i];
  11.         diff[i]=a[i]-b[i];
  12.     }
  13.     sort(diff.begin(),diff.end());
  14.     for(int j=n-1;j>=0;j--){
  15.         c+=(long long)diff[j]*(n-j);
  16.     }
  17.  
  18.     cout<<c<<endl;
  19. }
  20.  
  21. int main(){
  22.     solve();
  23. }
Success #stdin #stdout 0.01s 5316KB
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72
https://ideone.com/uckkLP
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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