#include <string.h>
#include <stdio.h>

typedef struct{
	int lv;
	int cnt;
}PARTY;

PARTY	party[1550];

int main(void){
	int i,j,k,n;
	int monster[1550];
	int minCnt = 9999999;
	
	scanf("%d", &n);
	
	for(i=0;i<n;i++){
		scanf("%d", &party[i].lv);
		party[i].cnt = 0;
	}
	for(i=0;i<n;i++){
		scanf("%d", &monster[i]);
	}
	
	for(i=0;i<n;i++){
		for(j=i+1;j<n;j++){
			if(party[i].lv > party[j].lv){
				int tmp = party[i].lv;
				party[i].lv = party[j].lv;
				party[j].lv = tmp;
			}
		}
	}
	
	
	for(i=0;i<n;i++){
		int maxCnt = 0;
		PARTY tParty[1550];
		for(j=0;j<n;j++){
			tParty[j].lv = party[j].lv;
			tParty[j].cnt=party[j].cnt;
		}
		
		for(j=0;j<n;j++){
			int mlv = monster[(i+j)%n]/2;
			tParty[0].lv += mlv;
			tParty[0].cnt += 1;
			if(maxCnt < tParty[0].cnt){
				maxCnt = tParty[0].cnt;
			}
			
			if(minCnt < maxCnt){
				break;
			}
			
			for(k=1;k<n;k++){
				if(tParty[k-1].lv > tParty[k].lv){
					int tmp = tParty[k-1].lv;
					tParty[k-1].lv = tParty[k].lv;
					tParty[k].lv = tmp;
					
					tmp = tParty[k-1].cnt;
					tParty[k-1].cnt = tParty[k].cnt;
					tParty[k].cnt = tmp;
				}else if(tParty[k-1].lv == tParty[k].lv && tParty[k-1].cnt > tParty[k].cnt){
					int tmp = tParty[k-1].lv;
					tParty[k-1].lv = tParty[k].lv;
					tParty[k].lv = tmp;
					
					tmp = tParty[k-1].cnt;
					tParty[k-1].cnt = tParty[k].cnt;
					tParty[k].cnt = tmp;
					
				}else{
					break;
				}
			}
		}
		
		if(maxCnt < minCnt){
			minCnt = maxCnt;
		}
		
	}
	
	printf("%d\n", minCnt);
	return 0;
}