#include<bits/stdc++.h>

using namespace std;

int main(){

freopen("ball.in","r",stdin);

freopen("ball.out","w",stdout);

int m,n;

scanf("%d %d",&m,&n);

int a[100010];

int sum;

for(int i=0;i<m;i++){

scanf("%d",&a[i]);

}

sort(a,a+m);

for(int i=0;i<n;i++){

cin>>sum;

if(binary_search(a,a+m,sum)){

printf("YES\n");

}else{

printf("NO\n");

}

}

return 0;

}