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  1. #include <stdio.h>
  2.  
  3. unsigned long long int rdtsc() {
  4.   unsigned long long int x;
  5.   __asm__ volatile ("rdtsc" : "=A" (x));
  6.   return x;
  7. }
  8.  
  9. int isEven(unsigned long long int number) {
  10. 	// fetch the begin time
  11. 	unsigned long long int beginTime = rdtsc();
  12.  
  13. 	// a magic corn loop
  14. 	while (number > 0) {
  15. 		// decrease
  16. 		number -= 2;
  17.  
  18. 		// got timeout?
  19. 		if (rdtsc() - beginTime > 5000000) {
  20. 			return 0;
  21. 		}
  22. 	}
  23.  
  24. 	// got an even number!!!11!11! call the fire department!!11!!!1
  25. 	return 1;
  26. }
  27.  
  28. int main(void) {
  29. 	if (isEven(10)) {
  30. 		printf("parzysta\n");
  31. 	} else {
  32. 		printf("nieparzysta\n");
  33. 	}
  34.  
  35. 	if (isEven(9)) {
  36. 		printf("parzysta\n");
  37. 	} else {
  38. 		printf("nieparzysta\n");
  39. 	}	
  40. }
  41.  
Success #stdin #stdout 0s 2248KB
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parzysta
nieparzysta
https://ideone.com/1vlMP6
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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