#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pi = pair<int, int>;
using pl = pair<long long, long long>;
using vi = vector<int>;
using vl = vector<long long>;
using vpi = vector<pair<int, int>>;
using vpl = vector<pair<long long, long long>>;
#define fur(i, a, b) for(ll i = a; i <= (ll)b; ++i)
#define ruf(i, a, b) for(ll i = a; i >= (ll)b; --i)
#define fr first
#define sc second
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define nl "\n"
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
const ll mxm = 5e5L;
ll n, m;
ll t[mxm];
ll a[mxm];
int main()
{
ios::sync_with_stdio(0);
cin.tie(0);
cin >> n >> m;
fur(i, 1, m) {
cin >> t[i];
}
fur(i, 1, m) {
cin >> a[i];
}
ll ans = 1;
fur(i, 2, m) {
if(abs(t[i] - t[i - 1]) < abs(a[i] - a[i - 1])) {
ans = 2;
}
}
cout << ans << nl;
}
