import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
public class MeetInTheMiddle {
static class Reader
{
final private int BUFFER_SIZE = 1 << 16;
private DataInputStream din;
private byte[] buffer;
private int bufferPointer, bytesRead;
public Reader()
{
din = new DataInputStream(System.in);
buffer = new byte[BUFFER_SIZE];
bufferPointer = bytesRead = 0;
}
public Reader(String file_name) throws IOException
{
din = new DataInputStream(new FileInputStream(file_name));
buffer = new byte[BUFFER_SIZE];
bufferPointer = bytesRead = 0;
}
public String readLine() throws IOException
{
byte[] buf = new byte[64]; // line length
int cnt = 0, c;
while ((c = read()) != -1)
{
if (c == '\n')
break;
buf[cnt++] = (byte) c;
}
return new String(buf, 0, cnt);
}
public int nextInt() throws IOException
{
int ret = 0;
byte c = read();
while (c <= ' ')
c = read();
boolean neg = (c == '-');
if (neg)
c = read();
do
{
ret = ret * 10 + c - '0';
} while ((c = read()) >= '0' && c <= '9');
if (neg)
return -ret;
return ret;
}
public long nextLong() throws IOException
{
long ret = 0;
byte c = read();
while (c <= ' ')
c = read();
boolean neg = (c == '-');
if (neg)
c = read();
do {
ret = ret * 10 + c - '0';
}
while ((c = read()) >= '0' && c <= '9');
if (neg)
return -ret;
return ret;
}
public double nextDouble() throws IOException
{
double ret = 0, div = 1;
byte c = read();
while (c <= ' ')
c = read();
boolean neg = (c == '-');
if (neg)
c = read();
do {
ret = ret * 10 + c - '0';
}
while ((c = read()) >= '0' && c <= '9');
if (c == '.')
{
while ((c = read()) >= '0' && c <= '9')
{
ret += (c - '0') / (div *= 10);
}
}
if (neg)
return -ret;
return ret;
}
private void fillBuffer() throws IOException
{
bytesRead = din.read(buffer, bufferPointer = 0, BUFFER_SIZE);
if (bytesRead == -1)
buffer[0] = -1;
}
private byte read() throws IOException
{
if (bufferPointer == bytesRead)
fillBuffer();
return buffer[bufferPointer++];
}
public void close() throws IOException
{
if (din == null)
return;
din.close();
}
}
public static void main(String[] args)throws IOException {
Reader s=new Reader();
int n=s.nextInt();
int x=s.nextInt();
int a[]=new int[n/2];
int b[]=new int[n-n/2];
for(int i=0;i<n/2;i++){
a[i]=s.nextInt();
}
for(int i=0;i<b.length;i++){
b[i]=s.nextInt();
}
ArrayList<Long> list1=getMap(a);
ArrayList<Long> list2=getMap(b);
Collections.sort(list2);
long ans=0;
for(long i:list1){
long reqd=x-i;
if(reqd>=0){
int ans1=-1,ans2=-1;
int low=0,high=list2.size()-1;
while(low<=high){
int mid=(low+high)>>1;
long el=list2.get(mid);
if(el>reqd){
high=mid-1;
}
else if(el<reqd){
low=mid+1;
}
else{
ans1=mid;
high=mid-1;
}
}
low=0;high=list2.size()-1;
while(low<=high){
int mid=(low+high)>>1;
long el=list2.get(mid);
if(el>reqd){
high=mid-1;
}
else if(el<reqd){
low=mid+1;
}
else{
ans2=mid;
low=mid+1;
}
}
if(ans1!=-1){
ans+=ans2-ans1+1;
}
}
}
System.out.println(ans);
}
public static ArrayList<Long> getMap(int a[]){
ArrayList<Long> list=new ArrayList<>();
int l=a.length;
for(int i=0;i<(1<<l);i++){
long sum=0;
for(int j=0;j<a.length;j++){
if((i&(1<<j))!=0){
sum+=a[j];
}
}
list.add(sum);
}
return list;
}
}
My Code gives TLE, but c++ code with same logic is accepted. Kindly Help