acdream 1726 A Math game

/* ***********************************************
Author        :xryz
Email         :xiang578@foxmail.com
Created Time  :7-11 11:59:34
File Name     :2015_07_11.cpp
************************************************ */

#include <stdio.h>
#include <string.h>
#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <string>
#include <math.h>
#include <stdlib.h>
#include <time.h>
using namespace std;

int a[50],h,n,use[50],sum[50],flag;

void dfs(int x,int cnt)
{

    if(cnt==h)
    {
        flag=1;
        return ;
    }
    if(cnt+sum[x]<h||cnt>h) return ;
    if(use[x]==0)
    {
        use[x]=1;
        dfs(x-1,cnt+a[x]);
        use[x]=0;
    }
    dfs(x-1,cnt);
    return ;
}
int main()
{

    int  i;
    while(~scanf("%d%d",&n,&h))
    {
        memset(a,0,sizeof(a));
        memset(sum,0,sizeof(sum));
        sum[0]=0;
        for(i=1; i<=n; i++)
        {
            scanf("%d",&a[i]);
            sum[i]=sum[i-1]+a[i];
        }
        memset(use,0,sizeof(use));
        flag=0;
        dfs(n,0);
        if(flag==1)
            printf("Yes\n");
        else
            printf("No\n");
    }
    return 0;
}