include<stdio.h>
int main() { int t,n,j,pie[101],rack[101],small_pie,small_rack,count=0,i,index1,index2; scanf("%d",&t); for(j=0;j<t;i++) {
scanf("%d",&n); for(i=0;i<n;i++)
{ scanf("%d",&pie[i]);
}
for(i=0;i<n;i++) { scanf("%d",&rack[i]);
} for(j=0;j<n;j++) {="" for(i="0;i<n;i++)" {="" small_pie="2000;" small_rack="2000;" if(small_pie="">pie[i])
{ small_pie=pie[i]; index1=i;
}
if(small_rack>rack[i]) {
small_rack=rack[i]; index2=i;
}
}
if(small_pie<=small_rack) {
count++; pie[index1]='\0'; rack[index2]='\0';
} else
{ rack[index2]='\0';
}
}
printf("%d\n",count); } return 0;
}