#include <bits/stdc++.h>
#define ll long long
#define forL(len) for (int i=1; i<=len; i++)
using namespace std;

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int N,M,a=0,b=0;
    cin>>N>>M;
    vector<int> A(N);
    forL(N)
        cin>>A[i-1];
    vector<int> B(M);
    forL(M)
        cin>>B[i-1];
    A.push_back(-1);
    A.insert(A.begin(), -1);
    B.push_back(-1);
    B.insert(B.begin(), -1);
    forL(N+2)
        if (A[i-1] > A[i-2] && A[i-1] > A[i]) a++;
    forL(M+2)
        if (B[i-1] > B[i-2] && B[i-1] > B[i]) b++;
    ll ans = a*b; cout << ans << endl;
    return 0;
}