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  1. #include <iostream>
  2. #include <cstdio>
  3. #include <cstring>
  4. using namespace std;
  5.  
  6. int main() {
  7. 	int t, r, n;
  8. 	char s[1000005];
  9. 	scanf("%d", &t);
  10. 	while(t--) {
  11. 		scanf("%s", s); 
  12. 		r=1; n=strlen(s);
  13. 		if(n%2==0) {
  14. 			for(int i=0; i<n/2; i++) {
  15. 				if(s[i]=='?' && s[n-1-i]=='?') r=(r*26)%10000009;
  16. 				else if(s[i]!=s[n-1-i] && s[i]!='?' && s[n-1-i]!='?') r *= 0;
  17. 				else r=(r*1)%10000009;
  18. 			}
  19. 		}
  20. 		else {
  21. 			for(int i=0; i<(n-1)/2; i++) {
  22. 				if(s[i]=='?' && s[n-1-i]=='?') r=(r*26)%10000009;
  23. 				else if(s[i]!=s[n-1-i] && s[i]!='?' && s[n-1-i]!='?') r *= 0;
  24. 				else r=(r*1)%10000009;
  25. 			}
  26. 			if(s[(n-1)/2]=='?') r=(r*26)%10000009;
  27. 		}
  28. 		printf("%d\n", r);
  29. 	}
  30. 	return 0;
  31. }
Success #stdin #stdout 0s 4196KB
comments ()
stdin
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5
?
??
ab?
a?c
aba
stdout
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26
26
1
0
1
https://ideone.com/7O3u5f
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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