What can i say,____________!!!

#include <bits/stdc++.h>
using namespace std;
int n, m, k,  i, j, dt[2001][2001] = {0}, num = 0, ans = 0;
int main() {
	cin >> n >> m >> k;
	num = m;
	for (i = 1; i <= m; i++) {

		int a, b;
		cin >> a >> b;
		dt[a][b] = 1;
	}

	for (i = 1; i <= k; ++i) {
		int gy, o;
		cin >> gy >> o;
		int y = 1, x = gy;
		while (1 < n) {
			if (y > n)
				break;
			if (dt[x][y] == 1) {

					dt[x][y] = 0;
					num--;
				if (o == 0) 
					o = 1;	
				else
					o = 0;
					continue;
				}
			if (o == 0) {	
				if (x - 1 == 0) {
					o = 1;
					continue;
				}
	x--;
				y++;
			}
			if (o == 1) {
				if (x + 1 > n) {
					o = 0;
					continue;
				}
				x++;
				y++;
			}
		}
	}
	cout << num;
	return 0;
}