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  1. #include <stdio.h>
  2. //a{n} = a{n-2} + a{n-3}, a{0}=3, a{1}=0, a{2}=2(再帰あり版)
  3.  
  4. int rec(int n){
  5.     if(n == 0){
  6.         return 3;
  7.     }
  8.     else if(n == 1){
  9.         return 0;
  10.     }
  11.     else if(n == 2){
  12.         return 2;
  13.     }
  14.     else{
  15.         return rec(n-2) + rec(n-3);
  16.     }
  17. }
  18.  
  19. int main(void) {
  20.     for(int i = 1; i <= 50; i++){   // n=0 は無視
  21.         if(rec(i) % i == 0){
  22.             printf("%d\n", i);
  23.         }
  24.     }
  25.     return 0;
  26. }
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/809YKe
language:
C (gcc 8.3)
created:
17 hours ago
visibility:
public

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