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  1. #include <cstdio>
  2. #include <algorithm>
  3.  
  4.  
  5. using namespace std;
  6.  
  7. int main()
  8. {
  9. 	int m, b;
  10. 	scanf("%d %d", &m, &b);
  11. 	long long ans = max((1 + b) * b / 2, (1 + b * m) * b * m / 2);
  12. 	for (int i = 1; i < b; i++)
  13. 	{
  14. 		long long cur_ans = 0;
  15. 		int cur_x = -1 * (i - b) * m;
  16. 		if (cur_x == 0)
  17. 		{
  18. 			continue;
  19. 		}
  20. 		cur_ans += ((1 + i) * i / 2) * (cur_x + 1) + ((0 + cur_x) * (cur_x + 1) / 2) * (i + 1);
  21. 		ans = max(ans, cur_ans);
  22. 	}
  23. 	printf("%lld", ans);
  24. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/2fGTY8
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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