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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		// your code goes here
  13. 		int [] nums = {5, -100, 5, 1};
  14. 		int k = 4;
  15. 		int n = nums.length;
  16. 		int[] preSum = new int[n + 1];
  17.  
  18. 		for(int i = 1; i <= n; i++){
  19. 			preSum[i] = nums[i - 1] + preSum[i-1];
  20. 		}
  21.  
  22. 		HashMap<Integer, Integer> map = new HashMap<>();
  23.  
  24. 		int ans = 0;
  25.  
  26. 		for(int j = 0; j < n; j++){
  27. 			int num1 = nums[j] - k;
  28. 			int num2 = nums[j] + k;
  29.  
  30. 			int sum1 = 0;
  31. 			int sum2 = 0;
  32.  
  33.  
  34. 			if(map.containsKey(num1)){
  35. 				sum1 = preSum[j + 1] - preSum[map.get(num1)];
  36. 			}
  37.  
  38. 			if(map.containsKey(num2)){
  39. 				sum2 = preSum[j + 1] - preSum[map.get(num2)];
  40. 			}
  41.  
  42. 			ans = Math.max(ans, Math.max(sum1, sum2));
  43.  
  44. 			int number = nums[j];
  45. 			int idx = j;
  46.  
  47. 			if(map.containsKey(number)){
  48. 				if(preSum[j + 1] < preSum[map.get(number) + 1]){
  49. 				map.put(number, j);
  50. 				}
  51. 			}else{
  52. 				map.put(number, j);
  53. 			}
  54. 		}
  55. 		System.out.println(ans);
  56. 	}
  57. }
Success #stdin #stdout 0.07s 52536KB
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https://ideone.com/pimXqP
language:
Java (HotSpot 12)
created:
2 hours ago
visibility:
public

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