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  1. import java.util.*;
  2.  
  3. class Ideone {
  4.     public static void main(String[] args) {
  5.         Scanner sc = new Scanner(System.in);
  6.         int n = sc.nextInt();
  7.         int k = sc.nextInt();
  8.         int arr[] = new int[n];
  9.         for (int i = 0; i < n; i++) arr[i] = sc.nextInt();
  10.  
  11.         HashMap<Integer,Integer> first = new HashMap<>();
  12.         HashMap<Integer,Integer> last = new HashMap<>();
  13.         int sum = 0, maxLen = 0, minLen = Integer.MAX_VALUE;
  14.         int maxCount = 0, minCount = 0;
  15.  
  16.         first.put(0,-1);
  17.         last.put(0,-1);
  18.  
  19.         for (int i = 0; i < n; i++) {
  20.             sum += arr[i];
  21.  
  22.             if (first.containsKey(sum - k)) {
  23.                 int len = i - first.get(sum - k);
  24.                 if (len > maxLen) {
  25.                     maxLen = len;
  26.                     maxCount = 1;
  27.                 } else if (len == maxLen) {
  28.                     maxCount++;
  29.                 }
  30.             }
  31.  
  32.             if (last.containsKey(sum - k)) {
  33.                 int len = i - last.get(sum - k);
  34.                 if (len < minLen) {
  35.                     minLen = len;
  36.                     minCount = 1;
  37.                 } else if (len == minLen) {
  38.                     minCount++;
  39.                 }
  40.             }
  41.  
  42.             if (!first.containsKey(sum)) first.put(sum,i);
  43.             last.put(sum,i);
  44.         }
  45.  
  46.         if (minLen == Integer.MAX_VALUE) minLen = 0;
  47.         System.out.println(maxLen + " " + maxCount);
  48.         System.out.println(minLen + " " + minCount);
  49.     }
  50. }
Success #stdin #stdout 0.15s 58912KB
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4
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2
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3 1
2 1
https://ideone.com/1MOusP
language:
Java (HotSpot 12)
created:
1 day ago
visibility:
public

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