import java.util.*;

public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		int n = sc.nextInt();
		int[] wallet = new int[n];
		int[] favorite = new int[n];
		for (int i=0; i<n; i++) {
			wallet[i] = sc.nextInt();
			favorite[i] = sc.nextInt();
		}

		int m = sc.nextInt();
		int[] price = new int[m];
		int[] spicy = new int[m];
		for (int i=0; i<m; i++) {
			price[i] = sc.nextInt();
			spicy[i] = sc.nextInt();
		}

		int[] miracle = new int[m];
		int best = -1;
		for (int i=0; i<n; i++) {
			for (int j=0; j<m; j++) {
				if (wallet[i]>=price[j] && favorite[i]<=spicy[j]) {
					miracle[j]++;
					best = Math.max(best,miracle[j]);
				}
			}
		}

		if (best==-1) {System.out.println(0);}
		else {
			for (int i=0; i<m; i++) {
				if (miracle[i]==best) {System.out.println(i+1);}
			}
		}
	}
}