/**
____ ____ ____ ____ ____ ____
||l |||e |||i |||n |||a |||d ||
||__|||__|||__|||__|||__|||__||
|/__\|/__\|/__\|/__\|/__\|/__\|
**/
#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
typedef long long ll;
void speed()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
}
const ll maxn = 300010;
ll n, m;
ll a[maxn], b[maxn], in[maxn], out[maxn], cp[maxn];
void solve()
{
cin >> n >> m;
for (ll i = 1; i <= n; i ++)
cin >> a[i];
for (ll i = 1; i <= n; i ++)
cin >> b[i];
if (m == 1)
{
ll mx = 1e9;
for (int i = 1; i <= n; i ++)
mx = min(mx, max(a[i], b[i]));
cout << mx << endl;
}
}
int main()
{
solve();
return 0;
}
