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  1. #include <iostream>
  2. #include <cstdio>
  3. #include <cstring>
  4. using namespace std;
  5.  
  6. int main() {
  7. 	int a[1005], max;
  8. 	char s[1005];
  9. 	scanf("%s\n", s);
  10. 	memset(a, 0, sizeof(a));
  11. 	max=0;
  12. 	for(int i=0; i<strlen(s); i++) {
  13. 		for(int j=i-1; j>=0; j-=2) {
  14. 			if(s[i]==s[j] && a[j]+1>a[i]) a[i]=a[j]+1;
  15. 		}
  16. 		if(a[i]>max) max=a[i];
  17. 	}
  18. 	printf("%d\n", max+1);
  19. 	return 0;
  20. }
Success #stdin #stdout 0s 3300KB
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https://ideone.com/43qAoS
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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