#include<stdio.h>
#include<stdlib.h>
int compar(const void *a, const void *b) {
  if (*(int*)a <  *(int*)b) return -1;
  if (*(int*)a == *(int*)b) return  0;
  return 1;
}
 
int main(){
	int c,n,w[10000],m[10000],i,sum,t;
	scanf("%d",&c);
 
	while(c--){
		scanf("%d", &n);
 
		for(i=0; i<n; i++) scanf("%d", &w[i]);
		for(i=0; i<n; i++) scanf("%d", &m[i]);
 
		qsort((void *)w, n, sizeof(int), compar);
	 	qsort((void *)m, n, sizeof(int), compar);
 
		sum = 0;
		for(int i=0; i<n; i++){
			t = w[i] - m[i];
			if(t < 0) t = -t;
			sum += t;
		}
 
		printf("%d\n", sum);
	}
 
	return 0;
}

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Mgo0CjEgMiAzIDQKOCA2IDcgNQozCi0xIDAgMQotMSAtMSAtMQ==

2
4
1 2 3 4
8 6 7 5
3
-1 0 1
-1 -1 -1