#include <bits/stdc++.h>

#define FIO ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
using namespace std;

typedef long long ll;
typedef long double ld;
const int N = 2e5 + 15, lg = 20;
int mod = 1e9 + 7;
int inf = 1e9;
bool badhigh[N];

int main() {
    FIO
    int n, m;
    cin >> n >> m;
    vector<int> v(n);
    for (auto &it:v)cin >> it;
    sort(v.begin(), v.end());
    for (int i = 0; i < m; i++) {
        int x, y;
        cin >> x >> y;
        badhigh[y] = 1;
    }
    ll ans = 0, co = 0;
    for (int h = v.back(); h > 0; h--) {
        while (v.size() && v.back() >= h)co++, v.pop_back();
        if (badhigh[h])continue;
        ans += co;
    }
    cout << ans << endl;
    return 0;
}