#include <iostream>
#include <cmath>
#include <algorithm>
using namespace std;

const long long Target = 500000000000000000LL;
long long N;
long long A[59];
long long B[59];

int main() {
	// Step 1. 入力
	cin >> N;
	for (int i = 1; i <= N; i++) cin >> A[i] >> B[i];

	// Step 2. 誤差の計算
	long long MinV = (1LL << 60);
	long long MinID = -1;
	for (int i = 2; i <= N; i++) {
		long long v1 = (A[1] + A[i]) / 2LL;
		long long v2 = (B[1] + B[i]) / 2LL;
		long long err = max(abs(v1 - Target), abs(v2 - Target));
		if (MinV > err) {
			MinV = err;
			MinID = i;
		}
	}

	// Step 3. 出力
	cout << 1 << endl;
	cout << 1 << " " << MinID << endl;
	return 0;
}