abc166_c.cpp

#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define fastio                      \
  ios_base::sync_with_stdio(false); \
  cin.tie(0);                       \
  cout.tie(0);
#define len(__x) (int) __x.size()
using ll = long long;
using ld = long double;
using vll = vector<ll>;
using pll = pair<ll, ll>;
using vll2d = vector<vll>;
using vi = vector<int>;
using vi2d = vector<vi>;
using pii = pair<int, int>;
using vii = vector<pii>;
using vc = vector<char>;
#define all(a) a.begin(), a.end()
#define snd second
#define fst first
#define pb(___x) push_back(___x)
#define mp(___a, ___b) make_pair(___a, ___b)
#define eb(___x) emplace_back(___x)

const ll INF = 1e18;

void run() {
	int n, m;
	cin >> n >> m;

	vector<int> h(n);
	for(auto &hi : h) cin >> hi;

	vi2d g(n);
	for(int i = 0; i < m; i++) {
		int a, b;
		cin >> a >> b;
		a--, b--;
		g[a].pb(b);
		g[b].pb(a);
	}

	int ans = 0;
	for (int i = 0; i < n; i++) {
		bool cur = true;
		for (auto &j : g[i]) {
			
				cur &= (h[i] > h[j]);
		}
		ans += cur;
	}

	cout << ans << endl;
}
int32_t main(void) {
  // fastio;
  int t;
  t = 1;
  // cin >> t;
  while (t--) run();
}

// AC, graphs