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  1. #include <stdio.h>
  2. #include <string.h>
  3. #include <ctype.h>
  4.  
  5.  
  6. char* poly_rep(char* s, size_t N){
  7. 	char*  p, *i, *o, *t = s;
  8. 	size_t k, l, n = strlen(s) + 1;
  9.  
  10.  
  11. 	while(*s){
  12. 		while(*s && ! isalnum(*s))
  13. 			++s;
  14.  
  15. 		p = s + 1;
  16. 		while(isalnum(*p))
  17. 			++p;
  18.  
  19. 		l = (size_t)(p - s);
  20. 		if(! (l % 2)){
  21.  
  22. 			i = p - 1;
  23. 			o = s;
  24. 			while((s < i) && (*s == *i)){
  25. 				++s;
  26. 				--i;
  27. 			}
  28.  
  29. 			if(s > i){
  30. 				if((n + l + 1) >= N)
  31. 					break;
  32.  
  33. 				k  = (size_t)(o - t);
  34. 				memmove(p + 1, o, (n - k) * sizeof(char));
  35. 				*p = ' ';
  36. 				p += l + 1;
  37. 				n += l + 1;
  38. 			}
  39. 		}
  40. 		s = p;
  41. 	}
  42. 	return t;
  43. }
  44.  
  45.  
  46. int main(void){
  47. 	char s[64] = "KOOK, wow [ABBA], bla 21LL12";
  48.  
  49. 	puts(s);
  50. 	puts( poly_rep(s, sizeof(s)- 1) );
  51. 	return 0;
  52. }
Success #stdin #stdout 0s 2052KB
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KOOK, wow [ABBA], bla 21LL12
KOOK KOOK, wow [ABBA ABBA], bla 21LL12 21LL12
https://ideone.com/gHB36M
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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