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  1. #include <stdio.h>
  2.  
  3. int sum_numbers(const char *s) {
  4.   int sum = 0, n = 0, i = 0;
  5.   for ( ; s && *s; ++s) {
  6.     if ('0' <= *s && *s <= '9') {
  7.       n = n * 10 + (*s - '0');
  8.       if (++i == 4) {
  9.         sum += n / 100 + n % 100;
  10.         n = 0;
  11.         i = 0;
  12.       }
  13.     }
  14.     else if (n) { // complete number
  15.       sum += n;
  16.       n = 0;
  17.       i = 0;
  18.     }
  19.   }
  20.   return sum + n;
  21. }
  22.  
  23. int main(void) {
  24.   char buf[BUFSIZ];
  25.   if (fgets(buf, sizeof buf, stdin))
  26.     return printf("%d", sum_numbers(buf)) < 0;
  27.   return 1;
  28. }
Success #stdin #stdout 0s 4384KB
comments (?)
stdin
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ab12345cd678e
stdout
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729
https://ideone.com/Cua1O4
language:
C (gcc 8.3)
created:
7 years ago
visibility:
secret

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