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  1. //入力した数字のオイラーのφ関数を出力
  2.  
  3. #include <stdio.h>
  4.  
  5. int main(void){
  6. 	int num,count;
  7. 	scanf("%d",&num);
  8. 	for(int i=1;i<num;i++){
  9. 		for(int j=1;j<i;j++){
  10. 			if(i%j&&num%j){
  11. 			}
  12. 			else{
  13. 				count++;
  14. 			}
  15. 		}
  16. 	}
  17. 	printf("φ(%d)=%d",num,count);
  18. 	return 0;
  19. }
Success #stdin #stdout 0.01s 5316KB
comments (?)
stdin
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10
stdout
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φ(10)=22
https://ideone.com/AzjOPu
language:
C (gcc 8.3)
created:
1 hour ago
visibility:
public

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