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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.  
  6. 	int n,t;
  7. 	cin>>n>>t;
  8.  
  9. 	int a[n];
  10. 	for(int i=0;i<n;i++)
  11. 	{
  12. 		cin>>a[i];
  13. 	}
  14.  
  15. 	long long lo = 0;
  16. 	long long hi = 1e18;
  17.  
  18. 	long long ans =0;
  19. 	while(lo <= hi)
  20. 	{
  21. 		long long mid = (lo+hi)/2;
  22. 		long long sum=0;
  23. 		for(int i=0;i<n;i++)
  24. 		{
  25. 			sum+=mid/a[i];
  26. 			if(sum >= t)
  27. 			{
  28. 				break;
  29. 			}
  30. 		}
  31.  
  32. 		if(sum >= t)
  33. 		{
  34. 			ans=mid;
  35. 			hi = mid-1;
  36. 		}
  37. 		else
  38. 		{
  39. 			lo = mid+1;
  40. 		}
  41.  
  42. 	}
  43. 	cout<<ans<<endl;
  44.  
  45. 	return 0;
  46. }
Success #stdin #stdout 0.01s 5272KB
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stdin
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3 7
3 2 5
stdout
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8
https://ideone.com/MYdgZs
language:
C++14 (gcc 8.3)
created:
10 days ago
visibility:
public

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