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  1. import java.util.Scanner;
  2. import java.util.HashMap;
  3. import java.util.Map;
  4.  
  5. class SubarrayLengthFinder {
  6.  
  7.     public static void main(String[] args) {
  8.         Scanner sc = new Scanner(System.in);
  9.         int n = sc.nextInt();
  10.         int[] arr = new int[n];
  11.  
  12.         for (int i = 0; i < n; i++) {
  13.             arr[i] = sc.nextInt();
  14.         }
  15.         int target = sc.nextInt();
  16.  
  17.         Map<Integer, Integer> map1 = new HashMap<>();
  18.         Map<Integer, Integer> map2 = new HashMap<>();
  19.  
  20.         int prefixSum = 0;
  21.         int maxLength = 0;
  22.         int minLength = Integer.MAX_VALUE;
  23.  
  24.         map1.put(0, -1);
  25.         map2.put(0, -1);
  26.  
  27.         for (int j = 0; j < n; j++) {
  28.             prefixSum += arr[j];
  29.  
  30.             int x = prefixSum - target;
  31.  
  32.             if (map1.containsKey(x)) {
  33.                 int i = map1.get(x);
  34.                 int currentLength = j - i;
  35.                 if (currentLength > maxLength) {
  36.                     maxLength = currentLength;
  37.                 }
  38.             }
  39.  
  40.             if (map2.containsKey(x)) {
  41.                 int i = map2.get(x);
  42.                 int currentLength = j - i;
  43.                 if (currentLength < minLength) {
  44.                     minLength = currentLength;
  45.                 }
  46.             }
  47.  
  48.             map1.putIfAbsent(prefixSum, j);
  49.             map2.put(prefixSum, j);
  50.         }
  51.  
  52.         System.out.println("Maximum Length: " + maxLength);
  53.  
  54.         if (minLength == Integer.MAX_VALUE) {
  55.             System.out.println("Minimum Length: 0");
  56.         } else {
  57.             System.out.println("Minimum Length: " + minLength);
  58.         }
  59.  
  60.         sc.close();
  61.     }
  62. }
  63.  
Success #stdin #stdout 0.17s 59044KB
comments (?)
stdin 
5
3 1 3 -2 2
4
stdout 
Maximum Length: 4
Minimum Length: 2
https://ideone.com/SxFfbr
language:
Java (HotSpot 12)
created:
3 days ago
visibility:
public

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