为什么是30分，求教

#include <iostream>
using namespace std;
typedef long long ll;

int main() {
	ll n, q, v, time = 0, a[100001], j = 1;

	cin >> n >> q >> v;

	for (ll i = 0; i <= 100000; i++)

		a[i] = 0;

	for (ll i = 1; i <= n; i++) {

		cin >> a[0];

		if (a[0] >= v) {
			time++;
			a[i] = 1;
		}
	}

	for (ll i = 1; i <= q ; i++) {

		ll x, y;
		cin >> x >> y;

		if (a[x] == 1) {
			if (y < v)
				time--;
		} else {
			if (y >= v)
				time++;
		}
	}

	cout << time;

	return 0;
}