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  1. #include <iostream>
  2. using namespace std;
  3. int arr[30000]={6,2,5,5,4,5,6,3,7,6},ans;
  4. int main(){
  5. 	int n;
  6. 	cin>>n;
  7. 	if(n<=4){
  8. 		cout<<0;
  9. 		return 0;
  10. 	}
  11. 	for(int i=10;i<=9999;i++){
  12. 		if(i/1000==0){
  13. 			continue;
  14. 		}
  15. 		arr[i]=arr[i%10]+arr[i/10%10]+arr[i/100%10]+arr[i/1000];
  16. 	}
  17. 	for(int i=1;i<=4999;i++){
  18. 		for(int j=1;j<=4999;j++){
  19. 			if(4+arr[i]+arr[j]+arr[i+j]==n){
  20. 				ans++;
  21. 			}
  22. 		}
  23. 	}
  24. 	cout<<ans;
  25. 	return 0;
  26.  
  27. }
Success #stdin #stdout 0.03s 5288KB
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https://ideone.com/vVMYDm
language:
C++ (gcc 8.3)
created:
10 hours ago
visibility:
public

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