fork download
copy 
  1. #include <iostream>
  2. #include<bits/stdc++.h>
  3.  
  4. using namespace std;
  5.  
  6. int main() {
  7. 	// your code goes here
  8. 	int n;
  9. 	cin>>n;
  10. 	vector<long long> arr(n);
  11. 	for(int i=0;i<n;i++){
  12. 		cin>>arr[i];
  13.  
  14. 	}
  15.  
  16. 	long long mod = 998244353;
  17.  
  18. 	vector<long long> prefix(n);
  19. 	for(int i=0;i<n;i++){
  20. 		if(i==0){
  21. 			prefix[i]=arr[i]%mod;
  22. 		}
  23. 		else{
  24. 			prefix[i]=(prefix[i-1]+arr[i])%mod;
  25.  
  26. 		}
  27. 	}
  28. 	long long ans=0;
  29.  
  30. 	for(int i=1;i<n;i++){
  31. 		int size = to_string(arr[i]).size();
  32. 		long long p = 1;
  33. 		for(int k=0;k<size;k++){
  34. 			p = p*10%mod;
  35. 		}
  36. 		long long sum = (prefix[i-1]*p + (long long)i*(arr[i]%mod))%mod;
  37. 		ans = (ans+sum)%mod;
  38.  
  39.  
  40. 	}
  41.  
  42. 	cout<<ans<<endl;
  43.  
  44. 	return 0;
  45. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
copy 
3
3 14 15
stdout
copy 
2044
https://ideone.com/Ea3ZRx
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!