import java.util.Scanner;
public class Main{
public static void main(String[] args){
Scanner in = new Scanner(System.in);
int n = in.nextInt();
int[][] traps = new int[n][2];
//1.获取输入
for(int i=0; i < n; i++){
traps[i][0] = in.nextInt();
}
for(int i=0; i < n; i++){
traps[i][1] = in.nextInt();
}
//2.计算min
int min = Integer.MAX_VALUE;
int sum;
for(int i=0; i < n; i++){
sum = traps[i][0] + traps[i][1] - 2;
if(sum < min)
min = sum;
}
System.out.println(min);
}
}