#include <bits/stdc++.h>
#define ff first
#define ss second
#define endl '\n'
using namespace std;
const long long INF = (long long) 1e18;
const int mod = (int) 1e9+7;
const int MAXN = (int) 3e5+5;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
ll n;
int a[MAXN];
ll pre[MAXN];
int main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);cout.tie(nullptr);
#ifdef Local
freopen("../IO/int.txt","r",stdin);
freopen("../IO/out.txt","w",stdout);
#endif
cin>>n;
for(ll i = 0; i < n; i++){
cin>>a[i];
pre[i] = (i > 0 ? pre[i - 1] : 0) + a[i];
}
ll P;
cin>>P;
ll ans = 0;
for(ll i = 0; i < n; i++){
for(ll j = i; j < n; j++){
ll cur = pre[j] - (i > 0 ? pre[i - 1] : 0);
if(P*(j - i + 1) <= cur)
ans++;
}
}
cout<<ans<<endl;
#ifdef Local
cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
#endif
}
