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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int pot4(int x) {
  5. 	return x * x * x * x;
  6. }
  7.  
  8. int main() {
  9. 	string s;
  10. 	cin >> s;
  11. 	int a = 0, b = 0;
  12. 	for (auto c : s) {
  13. 		a += c == '?';
  14. 		b += c == 'o';
  15. 	}
  16. 	int ans = 0;
  17. 	if (b == 0) ans = pot4(a); 
  18. 	if (b == 1) ans = pot4(a+1) - pot4(a);
  19. 	if (b == 2) ans = pot4(a+2) - 2 * pot4(a+1) + pot4(a);
  20. 	if (b == 3) ans = pot4(a+3) - 3 * pot4(a+2) + 3 * pot4(a+1) - pot4(a);
  21. 	if (b == 4) ans = 24;
  22. 	cout << ans << endl;
  23. 	return 0;
  24. }
Success #stdin #stdout 0s 5528KB
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https://ideone.com/SlAB6L
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
public

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