#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vl = vector<ll>;
using vvl = vector<vector<ll>>;
using pl = pair<ll, ll>;
using vpl = vector<pl>;
using vvpl = vector<vpl>;
const ll MOD = 1000000007;
const ll MOD9 = 998244353;
const int inf = 1e9 + 10;
const ll INF = 4e18;
const ll dy[8] = {1, 0, -1, 0, 1, 1, -1, -1};
const ll dx[8] = {0, -1, 0, 1, 1, -1, 1, -1};
template <class T>
inline bool chmin(T& a, T b) {
  if (a > b) {
    a = b;
    return true;
  }
  return false;
}
template <class T>
inline bool chmax(T& a, T b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
int main() {
  ll n, s;
  cin >> n >> s;
  vvl dp(n + 1, vl(s + 1, 0));
  vl a(n);
  for (ll i = 0; i < n; i++) cin >> a[i];
  dp[0][0] = 0;
  for (ll i = 0; i < n; i++) {
    for (ll j = 0; j < s + 1; j++) {
      if (j + a[i] <= s) dp[i + 1][j + a[i]] += dp[i][j];
      dp[i + 1][j] += dp[i][j];
    }
    dp[i + 1][0]++;
    if (a[i] <= s) dp[i + 1][a[i]]++;
  }
  ll ans = 0;
  for (ll i = 0; i < n + 1; i++) {
    ans += dp[i][s];
  }
  cout << ans << endl;
}
