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  1. #include <stdio.h>
  2.  
  3. int c = 0;
  4.  
  5. int rec(int n) {
  6.     c++;
  7.  
  8.     if (n == 0) return 3;
  9.     if (n == 1) return 0;
  10.     if (n == 2) return 2;
  11.  
  12.     return rec(n - 2) + rec(n - 3);
  13. }
  14.  
  15. int main(void) {
  16.     int n = 50;
  17.     for (int i = 0; i <= n; i++) {
  18.         printf("%d, ", rec(i));
  19.     }
  20.  
  21.     printf("\nrecが呼び出された回数: %d\n", c);
  22.     return 0;
  23. }
  24.  
Success #stdin #stdout 0.02s 5288KB
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stdin
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Standard input is empty
stdout
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3, 0, 2, 3, 2, 5, 5, 7, 10, 12, 17, 22, 29, 39, 51, 68, 90, 119, 158, 209, 277, 367, 486, 644, 853, 1130, 1497, 1983, 2627, 3480, 4610, 6107, 8090, 10717, 14197, 18807, 24914, 33004, 43721, 57918, 76725, 101639, 134643, 178364, 236282, 313007, 414646, 549289, 727653, 963935, 1276942, 
recが呼び出された回数: 7523625
https://ideone.com/claKzq
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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