#include <fstream>
#include <iostream>
#include <vector>
#include <algorithm>

int main() {

	//std::ifstream inf("Text.txt");	std::cin.rdbuf(inf.rdbuf());

	int N;
	std::cin >> N;
	std::vector<int> A(N), B(N);
	int max_price = 0;
	int min_hot = 100000000;

	for (int i = 0; i < N; i++) {
		std::cin >> A[i] >> B[i];
		if (A[i] > max_price) {
			max_price = A[i];
		}
		if (B[i] < min_hot) {
			min_hot = B[i];
		}
	}

	int M;
	std::cin >> M;
	std::vector<int> X(M), Y(M), ans(M);

	for (int i = 0; i < M; i++) {
		std::cin >> X[i] >> Y[i];
	}

	for (int i = 0; i < M; i++) {
		if (X[i] > max_price) {
			continue;
		}
		if (Y[i] < min_hot) {
			continue;
		}

		for (int j = 0; j < N; j++) {
			if (X[i] <= A[j]) {
				if (Y[i] >= B[j]) {
					ans[i]++;
				}
			}
		}

	}
	
	int max = *std::max_element(ans.begin(), ans.end());

	if (max != 0) {
		for (int i = 0; i < M; i++) {
			if (ans[i] == max) {
				std::cout << i + 1 << std::endl;
			}
		}
	}
	else {
		std::cout << "0" << std::endl;
	}

	return 0;
}