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  1. #include<stdio.h>
  2. char S[55];
  3. int cnt[256], ans = 0;
  4. int main() {
  5. 	scanf("%s", S);
  6. 	for (int i = 0; S[i]; i++) {
  7. 		if (cnt[S[i]]) {
  8. 			for (int j = 'A'; j <= 'Z'; j++) ans+=cnt[j]>cnt[S[i]];
  9. 			cnt[S[i]] = 0;
  10. 		}
  11. 		else cnt[S[i]] = i;
  12. 	}
  13. 	printf("%d", ans);
  14. 	return 0;
  15. }
Success #stdin #stdout 0s 4252KB
comments (?)
stdin 
ABCCABDDEEFFGGHHIIJJKKLLMMNNOOPPQQRRSSTTUUVVWWXXYYZZ
stdout 
1
https://ideone.com/ftmAGD
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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