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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. signed main(){
  4. 	int n, k;
  5. 	cin >> n >> k;
  6. 	vector<int> a(n);
  7. 	for(int i = 0; i < n; i++){
  8. 		cin >> a[i];
  9. 	}
  10. 	double l = 1, r = 1e7;
  11. 	double ans = 0;
  12. 	for(int i = 0; i < 60; i++){
  13. 		double mid = (l + r) * 0.5;
  14. 		int now = 0; 
  15. 		for(int j = 0; j < a.size(); j++){
  16. 			if((int)a[j] / mid < 1){
  17. 				now = 0;
  18. 				break;
  19. 			} 
  20. 			now += a[j] / mid; 
  21.  
  22. 		}		
  23. 		if(now >= k){
  24. 			l = mid;
  25. 			ans = max(ans, mid);
  26. 		}else{
  27. 			r = mid;
  28. 		}
  29.  
  30. 	}
  31. 	cout << fixed << setprecision(15) << ans;
  32. }
Success #stdin #stdout 0s 5280KB
comments (?)
stdin 
1 1
7
stdout 
6.999999999996483
https://ideone.com/uYiCy2
language:
C++14 (gcc 8.3)
created:
4 days ago
visibility:
public

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