Array

import java.util.HashMap;
//import kilo4.IO;

/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
//package kilo4;
/**
 *
 * @author asjuvone
 */
public class T4 {

    public static void main(String[] args) {
        IO io = new IO();

        int n = io.nextInt();
        int x = io.nextInt();
        int[] arr = new int[n];
        HashMap<Long, Integer> hm = new HashMap();

        for (int i = 0; i < n; i++) {
            arr[i] = io.nextInt();
        }

        hm.put(0l, 1);
        long[] summat = new long[n];
        long count = 0;
        summat[0] = arr[0];
        for (int i = 0; i < n; i++) {
            if (i == 0) {
                summat[i] = arr[i];
            } else {
                summat[i] = summat[i - 1] + arr[i];
            }
            long summa = summat[i];

            if (hm.containsKey(summa - x)) {
                count += hm.get(summa - x);
            }

            if (hm.containsKey(summa)) {
                hm.put(summa, hm.get(summa) + 1);
            } else {
                hm.put(summa, 1);
            }

        }
        System.out.println(count);

    }
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED

Test 21

Verdict: ACCEPTED