View Code of Problem 133

#include<stdio.h>
#include<string.h>
#define MAX 100000+10
int a[MAX],b[MAX],c[MAX];
int main(){
    int n,flag,x,tc;
    int i;
    scanf("%d",&tc);
    while(tc--){
        scanf("%d%d",&n,&x);
        flag=0;
        memset(a,0,sizeof(a));
        memset(b,0,sizeof(b));
        memset(c,0,sizeof(c));
        for(i=0;i<n;i++){
            scanf("%d",a+i);
            if(a[i]>=0)
            b[a[i]]++;
            else c[-a[i]]++;
        }
        for(i=0;i<n;i++){
            if(x-a[i]>=0){
                if(a[i]==x-a[i]&&b[a[i]]>1){flag=1;break;}
                if(a[i]!=x-a[i]&&b[x-a[i]]){flag=1;break;}
            }
            else {
                if(a[i]==x-a[i]&&c[-a[i]]>1){flag=1;break;}
                if(a[i]!=x-a[i]&&c[a[i]-x]){flag=1;break;}
            }
        }
        printf(flag?"YES\n":"NO\n");
    }
    return 0;
}