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  1. #include <stdio.h>
  2. int rec(int n);
  3.  
  4. int main(void) {
  5.     printf("%d\n", rec(4));
  6.     return 0;
  7. }
  8.  
  9. int rec(int n) {
  10.     if (n == 1) {return ( 2 );
  11. }
  12.     else if (n == 2) { return ( 1 ); }
  13.     else { return rec(n-1)+2*rec(n-2); }
  14. }
Success #stdin #stdout 0s 5316KB
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https://ideone.com/MG0DyK
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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