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  1. #include <stdio.h>
  2. int c = 0;
  3. int rec(int n) {
  4.     if (n == 0)
  5.         return 3;
  6.     else if (n == 1)
  7.         return 0;
  8.     else if (n == 2)
  9.         return 2;
  10.     else
  11.         return rec(n-2) + rec(n-3);
  12. }
  13. int main(void) {
  14.     int n = 50;
  15.     for (int i = 1; i <= n; i++) {
  16.         if (rec(i) % i == 0) {
  17.             c++;
  18.             printf("%d, ", i);
  19.         }
  20.     }
  21.     printf("\nカウント: %d\n", c);
  22.     return 0;
  23. }
  24.  
Success #stdin #stdout 0.02s 5280KB
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stdin
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Standard input is empty
stdout
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1, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 
カウント: 16
https://ideone.com/rtzDSD
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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