Unaccepted 求调

#include<bits/stdc++.h>
using namespace std;
long long a[200005],sum[200005],n,T;
long long t[200005];
long long ans;
void Merge(long long a[],int L,int mid,int R) {
	int i=L,j=mid+1,k=L;
	while(i<=mid&&j<=R)
		if(a[j]-a[i]<T){
			ans+=mid-i+1;
			j++;
		}
		else i++;
	i=L,j=mid+1;
	while(i<=mid&&j<=R)
		if(a[i]<=a[j]) t[k++]=a[i++];
		else t[k++]=a[j++];
	while(i<=mid) t[k++]=a[i++];
	while(j<=R) t[k++]=a[j++];
	for(k=L;k<=R;k++) a[k]=t[k];
	return ;
}
void MergeSort(long long a[],int L,int R) {
	if(L==R) return ;
	int mid=L+(R-L>>1);
	MergeSort(a,L,mid);
	MergeSort(a,mid+1,R);
	Merge(a,L,mid,R);
	return ;
}
int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);cout.tie(0);
	cin>>n>>T;
	for(int i=1;i<=n;i++) cin>>a[i],sum[i]=sum[i-1]+a[i];
	MergeSort(sum,1,n);
	cout<<ans<<endl;
	return 0;
}