Array

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;

ll n, x;

int main() {
  cin >> n >> x;
  multiset<ll> s;
  ll add = 0;
  ll ans = 0;
  for(int i = 0; i < n; ++i) {
    ll a;
    cin >> a;
    if(i != 0) {
      add += a;
    }
    s.insert(a - add);
    ans += s.count(x - add);
  }
  cout << ans << "\n";
  return 0;
}

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: TIME LIMIT EXCEEDED