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  1. #include <iostream>
  2. #include <math.h>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	unsigned long n,digit_sum(unsigned long);
  7. 	bool isSquare(unsigned long),isCube(unsigned long);
  8. 	for(n=100000;n<500000;n++)
  9. 		{
  10. 			if(digit_sum(n)==43)
  11. 				{
  12. 					if(isSquare(n) && !isCube(n))
  13. 						{
  14. 							cout<<n;
  15. 							return 0;
  16. 						}
  17. 					if(!isSquare(n) && isCube(n))
  18. 						{
  19. 							cout<<n;
  20. 							return 0;
  21. 						}
  22. 				}
  23. 		}
  24. 		for(n=500000;n<1000000;n++)
  25. 			{
  26. 				if(digit_sum(n)==43)
  27. 					{
  28. 						if(isSquare(n) && isCube(n))
  29. 							{
  30. 								cout<<n;
  31. 								return 0;
  32. 							}
  33. 					}
  34. 			}
  35. 	return 0;
  36. }
  37. bool isSquare(unsigned long x)
  38. 	{
  39. 		return (sqrt(x)-long(sqrt(x))==0) ? true : false;
  40. 	}
  41. bool isCube(unsigned long x)
  42. 	{
  43. 		return (cbrt(x)-long(cbrt(x))==0) ? true : false;
  44. 	}
  45. unsigned long digit_sum(unsigned long x)
  46. 	{
  47. 		unsigned long ret=0;
  48. 		while(x>=1)
  49. 			{
  50. 				ret+=(x%10);
  51. 				x/=10;
  52. 			}
  53. 		return ret;
  54. 	}
Success #stdin #stdout 0.01s 3460KB
comments ()
stdin 
Standard input is empty
stdout 
499849
https://ideone.com/RQpwrl
https://b...content-available-to-author-only...t.org/problems/a-problem-by-rama-devi/
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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