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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	int a=3, n=0;
  5. 	do
  6. 	{
  7. 		a=2*a-1;
  8. 		n = n + 1;
  9. 	}
  10. 	while( a<=10000 );
  11. 	printf("2の %d 番目で %d となり、初めて１００００を超えます\n", n,a);
  12. 	return 0;
  13. }
  14.  
Success #stdin #stdout 0s 5284KB
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Standard input is empty
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2の 13 番目で 16385 となり、初めて１００００を超えます
https://ideone.com/aCqPZ0
language:
C (gcc 8.3)
created:
9 days ago
visibility:
public

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