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  1. #include <stdio.h>
  2.  
  3. int fn(int n){
  4. 	if(n<=0){
  5. 		printf("\n0");
  6. 	}else{
  7. 		printf("%d",n);
  8. 		fn(n-2);
  9. 		fn(n-1);
  10. 		printf("%d",n);
  11. 	}
  12. }
  13.  
  14. int main(void) {
  15. 	fn(2);
  16. 	return 0;
  17. }
  18.  
Success #stdin #stdout 0s 5304KB
comments (?)
stdin 
Standard input is empty
stdout 
2
01
0
012
https://ideone.com/wZGOPT
language:
C (gcc 8.3)
created:
10 days ago
visibility:
public

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