#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
using namespace std;

const int N = 1005;

int A[ N ], B[ N ];
int n;

int main( void ) {
	scanf( "%d", &n );
	for( int i = 0; i < n; i++ ) scanf( "%d", A + i );
	for( int i = 0; i < n; i++ ) scanf( "%d", B + i );
	int sol = ( 1 << 20 );
	for( int i = 0; i < n; i++ ) {
		sol = min( sol, A[ i ] + B[ i ] );
	}
	printf( "%d\n", sol );
	return 0;
}