Problem:
Exhaustive Search

Write a program which reads a sequence A of n elements and an integer M, and outputs "yes" if you can make M by adding elements in A, otherwise "no". You can use an element only once.

You are given the sequence A and q questions where each question contains Mi.

Input

In the first line n is given. In the second line, n integers are given. In the third line q is given. Then, in the fourth line, q integers (Mi) are given.

Output

For each question Mi, print yes or no.

Constraints

n ≤ 20

q ≤ 200

1 ≤ elements in A ≤ 2000

1 ≤ Mi ≤ 2000

Sample Input 1

5
1 5 7 10 21
8
2 4 17 8 22 21 100 35

Sample Output 1

no
no
yes
yes
yes
yes
no
no

Notes

You can solve this problem by a Burte Force approach. Suppose solve(p, t) is a function which checkes whether you can make t by selecting elements after p-th element (inclusive). Then you can recursively call the following functions:

solve(0, M)

solve(1, M-{sum created from elements before 1st element})

solve(2, M-{sum created from elements before 2nd element})

...

The recursive function has two choices: you selected p-th element and not. So, you can check solve(p+1, t-A[p]) and solve(p+1, t) in solve(p, t) to check the all combinations.

For example, the following figure shows that 8 can be made by A[0] + A[2].

Solution in C (judge verdict: Accepted)

#include <stdio.h>
int ex_search(int a[],int n,int j,int x,int *check_p){
    if(*check_p==1)return 1;
    if(x==0){*check_p=1;return 1;}
    j++;
    if(j<=n) {
        int new_x = x - a[j];
        if(new_x>=0)ex_search(a,n,j,new_x,check_p);
        ex_search(a,n,j,x,check_p);
    }
    return 0;
}

int main() {
  int i,x,m,n;
  scanf("%d",&n);
  int a[n];
  for(i=0;i<n;i++){
  scanf("%d",&a[i]);
  }

  scanf("%d",&m);
  int j;
  int check=0;
  int *check_p=&check;
  for(i=0;i<m;i++){
      j=-1;
      check=0;
      scanf("%d",&x);
      ex_search(a,n,j,x,check_p);
      if(check==1)printf("yes\n");
      if(check==0)printf("no\n");
  }
  return 0;
}