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  1. #include <stdio.h>
  2. #include <string.h>
  3. #include <ctype.h>
  4.  
  5. void rr(char *s) {
  6.     if (s[0] == '\0') {
  7.         return;
  8.     }
  9.  
  10.     char c[1000]; // Assuming the output will not exceed 1000 characters.
  11.     int cnt = 1, j = 0;
  12.  
  13.     for (int i = 1; i < strlen(s); i++) {
  14.         if (s[i] == s[i - 1]) {
  15.             cnt++;
  16.         } else {
  17.             c[j++] = s[i - 1];
  18.             if (cnt > 1) {
  19.                 sprintf(c + j, "%d", cnt);
  20.                 while (isdigit(c[j])) j++;
  21.             }
  22.             cnt = 1;
  23.         }
  24.     }
  25.  
  26.     // Adding the last character and its count
  27.     c[j++] = s[strlen(s) - 1];
  28.     if (cnt > 1) {
  29.         sprintf(c + j, "%d", cnt);
  30.         while (isdigit(c[j])) j++;
  31.     }
  32.     c[j] = '\0'; // Null-terminate the new string.
  33.  
  34.     // Remove '1' after letters
  35.     char fc[1000];
  36.     j = 0;
  37.     for (int i = 0; i < strlen(c); i++) {
  38.         if (isalpha(c[i]) && c[i + 1] == '1') {
  39.             fc[j++] = c[i];
  40.             i++; // Skip the '1'
  41.         } else {
  42.             fc[j++] = c[i];
  43.         }
  44.     }
  45.     fc[j] = '\0';
  46.  
  47.     // If the final compressed string is shorter, print it
  48.     if (strlen(fc) < strlen(s)) {
  49.         printf("%s\n", fc);
  50.         return;
  51.     }
  52.  
  53.     // Otherwise, print the original string
  54.     printf("%s\n", s);
  55. }
  56.  
  57. int main() {
  58.     char input[1000];
  59.     scanf("%s", input);
  60.     rr(input);
  61.     return 0;
  62. }
  63.  
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin
copy 
QQQQQQQQQQQQQQQABCCCCCCCCCCZZZZZZZZZZ
stdout
copy 
Q5ABC0Z0
https://ideone.com/PXFjPt
language:
C (gcc 8.3)
created:
39 days ago
visibility:
public

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