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  1. #include <bits/stdc++.h>
  2. #define int long long
  3. #define double long double
  4. #define fi first
  5. #define se second
  6. #define endl "\n"
  7. #define ii pair<int,int>
  8. using namespace std;
  9. const int mod=998244353;
  10. const int N=3e5+5;
  11. int sum(int n){
  12. 	int ans=n*(n+1)*(2*n+1)/6;
  13. 	return ans;
  14. }
  15. signed main(){
  16. 	cin.tie(0)  -> sync_with_stdio(false);
  17. 	freopen("BAI4.INP","r",stdin);
  18. 	freopen("BAI4.OUT","w",stdout);
  19. 	int q; cin >> q;
  20. 	while (q--){
  21. 		int n; cin >> n;
  22. 		int l=1,r=1500000;
  23. 		int ans=0;
  24. 		while(l<=r){
  25. 			int m=(l+r)/2;
  26. 			if (sum(m)<=n){
  27. 				ans=max(ans,m);
  28. 				l=m+1;
  29. 			}
  30. 			else {
  31. 				r=m-1;
  32. 			}
  33. 		}
  34. 		cout << ans << " ";
  35. 	}
  36. 	return 0; 
  37. }
  38. // đứng ở dưới thì code mạnh tay lên ai sợ thì đi về
  39. // phong cách phong cách
Success #stdin #stdout 0s 5284KB
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https://ideone.com/A9L08c
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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