fork(2) download
copy 
  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int n,m,k;
  7. 	long long f=1,p=1000000007;
  8. 	cin >> n >> m;
  9. 	if (abs(n-m)>1) cout << "0";
  10. 	else {
  11. 		k=min(n,m);
  12. 		for (int i=1; i<=k; i++) { 
  13. 			f=f*i;
  14. 			if (f>=p) f=f%p;
  15. 		}
  16. 		f=f*f;
  17. 		if (f>=p) f=f%p;
  18. 		if (n==m) f=2*f;
  19. 		else f=f*max(n,m);
  20. 		if (f>=p) f=f%p;
  21. 		cout << f;
  22. 	}
  23. 	return 0;
  24. }
Success #stdin #stdout 0s 15232KB
comments (?)
stdin
copy 
99999 100000
stdout
copy 
768947656
https://ideone.com/YE4NT1
language:
C++ (gcc 8.3)
created:
5 years 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!