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  1. #include <iostream>
  2. #include <cstdlib>
  3. #include <vector>
  4.  
  5. using namespace std;
  6.  
  7. int main()
  8. {
  9. 	const long n = 2025;
  10. 	vector<vector<long> > dp(n, vector<long>(n, 0));
  11. 	dp [1] [1] = 1;
  12. 	for(long i = 2; i < n; ++i)
  13. 	{
  14. 		dp [1] [i] = dp [1] [i - 1] + i;
  15. 		dp [i] [1] = dp [i - 1] [1] + i;
  16. 	}
  17. 	int k = 0, l = 0;
  18. 	long delta = 2000001;
  19. 	for(long i = 2; i < n; ++i)
  20. 		for(long j = 2; j < n; ++j)
  21. 		{
  22. 	        	dp [i] [j] = dp [i - 1] [j] + dp [i] [j - 1] - dp [i - 1] [j - 1] + i * j;
  23. 	        	if(abs(2000000 - dp [i] [j]) < delta)
  24. 	        	{
  25. 	        		k = i;
  26. 	        		l = j;
  27. 	        		delta = abs(2000000 - dp [k] [l]);
  28. 	        	}
  29. 			if(dp [i] [j] > 2000000)
  30. 				break;
  31. 		}
  32. 	cout << k * l << ' ' << dp [k] [l] << endl;
  33. 	return 0;
  34. }
Success #stdin #stdout 0.03s 2812KB
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2772 1999998
https://ideone.com/80p8NP
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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