fork download
copy 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	long long N, M, sum = 0;
  6. 	vector<long long> A, psum;
  7. 	cin >> N >> M;
  8. 	for(int i = 0; i < N; i++) {
  9. 		long long tmp;
  10. 		cin >> tmp;
  11. 		A.push_back(tmp);
  12. 	}
  13. 	sort(A.begin(), A.end(), greater<long long>());
  14. 	for(int i = 0; i < N; i++) {
  15. 		sum += A[i];
  16. 		psum.push_back(sum-A[i]*(i+1));
  17. 	}
  18. 	/*
  19. 	for(int i = 0; i < N; i++)
  20. 		cout << A[i] << " ";
  21. 	cout << endl;
  22. 	for(int i = 0; i < N; i++)
  23. 		cout << psum[i] << " ";
  24. 	cout << endl;
  25. 	/**/
  26. 	int lo = 0, hi = N-1, mid;
  27. 	while(hi-lo > 0) {
  28. 		mid = (lo+hi)/2;
  29. 		if(psum[mid] < M)
  30. 			lo = mid+1;
  31. 		else
  32. 			hi = mid;
  33. 	}
  34. 	if(A[lo]+(psum[lo]-M)/lo >= 0)
  35. 		cout << A[lo]+(psum[lo]-M)/lo << endl;
  36. 	else
  37. 		cout << -1 << endl;
  38. 	return 0;
  39. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
copy 
5 125
2 7 2 9 5
stdout
copy 
-1
https://ideone.com/RNzF9p
language:
C++ (gcc 8.3)
created:
5 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!