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  1. #include <stdio.h>
  2. int main() {
  3. int a0,a1,n,count=1;
  4. a0=1;
  5. a1=2;
  6. while(n<100)
  7. {
  8. n=a0*2+3*a1;
  9. a0=a1;
  10. a1=n;
  11. }
  12. for(n=n; n<=1000; n=a0*2+3*a1){
  13. a0=a1;
  14. a1=n;
  15. count=count+1;
  16. }
  17. printf("%d個\n",count-1);
  18. return 0;
  19. }
  20.  
Success #stdin #stdout 0s 5540KB
stdin
Standard input is empty
stdout
2個