# include <stdio.h> #include<string.h> int a[10000000],b[10000000]; int main() { int i,t,n,x; scanf("%d",&t); while(t--) { scanf("%d%d",&n,&x); memset(a,0,sizeof(a)); for(i=1;i<=n;i++) { scanf("%d",&b[i]); a[b[i]]=i; } for(i=1;i<=n;i++) if(a[x-b[i]]!=0) break; if(i<n) printf("YES\n"); else printf("NO\n"); } } |
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