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  1. #include <stdio.h>
  2.  
  3. struct a;
  4.  
  5. struct b {
  6. struct a *ap;
  7. };
  8.  
  9. struct a {
  10. struct b *bp;
  11. };
  12.  
  13. int main(void) {
  14. // your code goes here
  15. return 0;
  16. }
  17.  
Success #stdin #stdout 0s 2048KB
stdin
Standard input is empty
stdout
Standard output is empty