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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	const int mod = 1000000007;
  6. 	int x,n;
  7. 	cin>> x >> n;
  8. 	long long f = 0;
  9. 	long long power = 1;
  10. 	for(int i = 1; i<=n; i++){
  11. 		power = (power *x) % mod;
  12. 		f = (f+power) % mod;
  13.  
  14. 	}
  15. 	cout<<f;
  16. 	return 0;
  17. }
Success #stdin #stdout 0s 5316KB
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https://ideone.com/A3wpnJ
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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