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  1. #include <stdio.h>
  2.  
  3. int div3(int x) {
  4. 	int a = x>>4;
  5. 	int b = x&0x0f;
  6. 	int y = a + (a<<2);
  7. 	b = a+b;
  8. 	y+=((b<<2)+(b)+(b>>1))>>4;
  9. 	return y;
  10. }
  11. int main(void) {
  12. 	// your code goes here
  13. 	for(int i=0;i<256;i++){
  14. 		int y = div3(i);
  15. 		if(y!=i/3){
  16. 			printf("y=%d, i/3=%d, i=%d\n",y,i/3,i);
  17. 		}
  18. 	}
  19. 	return 0;
  20. }
  21.  
Success #stdin #stdout 0s 5412KB
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https://ideone.com/25JiTl
language:
C (gcc 8.3)
created:
1 year ago
visibility:
secret

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