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  1. #include <stdio.h>
  2.  
  3. int rec(int n){
  4.     if(n<0){
  5.         return 0; 
  6.     } else if(n == 0){
  7.         return 3;
  8.     } else if(n == 1){
  9.         return 0;
  10.     } else if(n == 2){
  11.         return 2;
  12.     } else {
  13.         return rec(n-2) + rec(n-3);
  14.     }
  15. }
  16.  
  17. int main(void) {
  18.     int n_max = 50;
  19.     int an;
  20.  
  21.     printf("an %% n == 0 となる n の値:\n");
  22.     for (int n = 1; n <= n_max; n++) {  
  23.         an = rec(n);
  24.         if (an % n == 0) {  
  25.             printf("%d, ", n);
  26.         }
  27.     }
  28.     printf("\n");
  29.  
  30.     return 0;
  31. }
Success #stdin #stdout 0.01s 5324KB
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stdin
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Standard input is empty
stdout
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an % n == 0 となる n の値:
1, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47,
https://ideone.com/G7SApb
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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