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  1. import java.io.*;
  2. import java.util.*;
  3.  
  4. public class Ideone {
  5. 	@SuppressWarnings("unused")
  6. 	public static void main(String[] args) {
  7. 		MyScanner in = new MyScanner();
  8.  
  9. 		int q=in.nextInt();
  10. 		Main:
  11. 		while(q-->0) {
  12. 			int n=in.nextInt(), k=in.nextInt();
  13. 			int[] prices = new int[n];
  14. 			int minPrice=Integer.MAX_VALUE;
  15. 			for(int i=0; i<n; i++) {
  16. 				prices[i]=in.nextInt();
  17. 				minPrice=Math.min(prices[i], minPrice);
  18. 			}
  19. 			//check
  20. 			int do1 = minPrice+k;
  21. 			boolean can=true;
  22. 			for(int i=0; i<n; i++) {
  23. 				if(prices[i]>2*k+minPrice) {
  24. 					can=false;
  25. 					break;
  26. 				}
  27. 			}
  28. 			if(can)
  29. 				System.out.println(do1);
  30. 			else
  31. 				System.out.println(-1);
  32. 		}
  33. 	}
  34.  
  35. 	static class MyScanner {
  36. 		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  37. 		StringTokenizer st;
  38.  
  39. 		String next() {
  40. 			while(st==null||!st.hasMoreTokens()) {
  41. 				try {
  42. 					st = new StringTokenizer(br.readLine());
  43. 				} catch (Exception e) {}
  44. 			}
  45. 			return st.nextToken();
  46. 		}
  47.  
  48. 		int nextInt() {
  49. 			return Integer.parseInt(next());
  50. 		}
  51. 	}
  52. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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1
3 4
1 3 6
compilation info 
Main.java:4: error: class Ideone is public, should be declared in a file named Ideone.java
public class Ideone {
       ^
1 error
stdout
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Standard output is empty
https://ideone.com/aclptf
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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