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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. char c;
  5. int sum = 0;
  6.  
  7. for (int i = 0; scanf("%c", &c) == 1; ++i) {
  8. if (i) {
  9. printf("+");
  10. }
  11. printf("%c", c);
  12. sum += c - '0';
  13. }
  14. printf("=%d", sum);
  15. return 0;
  16. }
  17.  
Success #stdin #stdout 0s 4564KB
stdin
6841
stdout
6+8+4+1=19