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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. const int M = 1e9 + 7;
  5. long long int powxy(long long int x, long long int y) {
  6. 	if (y == 0) return 1;
  7. 	if (y&1) return (x*powxy(x, y-1))%M;
  8. 	long long int t = powxy(x, y/2);
  9. 	return (t*t)%M;
  10. }
  11.  
  12. long long int pow10(long long int n) {
  13. 	return powxy(10, n);
  14. }
  15.  
  16. int main() {
  17. 	int m = 8;
  18. 	long long int n = 1e18;
  19. 	long long int res = pow10(n);
  20. 	res = (res*m)%M;
  21. 	cout << res;
  22. 	return 0;
  23. }
Success #stdin #stdout 0s 4548KB
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19208
https://ideone.com/8h8wmh
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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