use std::env;
use std::io;

const TARGET: i64 = 500_000_000_000_000_000;

fn main() {
    env::set_var("RUST_BACKTRACE", "1");

    let mut n = String::new();
    io::stdin().read_line(&mut n).expect("Failed to read line");
    let n: usize = n.trim().parse().expect("Failed to parse N");

    let mut a = [0i64; 50];
    let mut b = [0i64; 50];

    for i in 1..=n {
        let mut input = String::new();
        io::stdin()
            .read_line(&mut input)
            .expect("Failed to read line");

        let pair: Vec<i64> = input
            .split_whitespace()
            .map(|s| s.parse().expect("Failed to parse i64"))
            .collect();

        if pair.len() == 2 {
            a[i] = pair[0];
            b[i] = pair[1];
        } else {
            panic!("Invalid input format for A_i B_i");
        }
    }

    let mut min_v = i64::MAX;
    let mut min_id = !0;
    for i in 2..=n {
        let v1 = (a[1] + a[i]) / 2; 
        let v2 = (b[1] + b[i]) / 2; 
        let err = ((v1 - TARGET).abs()).max((v2 - TARGET).abs());
        if err < min_v {
            min_v = err;
            min_id = i;
        }
    }

    println!("1");    
    println!("{} {}", 1, min_id);    
}