C++
#include<bits/stdc++.h>
using namespace std;
#define INF 2147483647
#define INFL 9223372036854775807
#define pii pair<int,int>
#define F first
#define S second
#define mp make_pair
#define pb push_back
#define ll long long
#define ull unsigned long long
#define M 1000000007
#define FASTIO ios_base::sync_with_stdio(false);cin.tie(NULL); cout.tie(NULL);
#define take(x) scanf("%d",&x)
#define DE(x) printf("\ndebug %d\n",x);
#define vout(x) for(int i=0;i<x.size();i++) printf("%d ",x[i]);
#define pie acos(-1)
#define MOD 998244353
int main(){
int n,x;
take(n);
take(x);
ll ara[n+1];
ara[0] = 0;
map<ll,int> m;
ll res = 0;
for(int i=1;i<=n;i++){
cin>>ara[i];
ara[i]+=ara[i-1];
}
for(int i = n;i>=0;i--){
res+= m[ara[i]+x ];
m[ara[i]]++;
}
cout<<res;
}