package contest200722;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Comparator;
import java.util.InputMismatchException;
import java.util.Random;

public class C2 {
	InputStream is;
	PrintWriter out;
	String INPUT = "";
	
	void solve()
	{
		int n = ni();
		int[][] co = new int[n][];
		for(int i = 0;i < n;i++){
			co[i] = new int[]{ni(), ni(), i};
		}
		for(int K = 0;K < 4;K++){
			int[][] seled = go(co);
			if(seled.length >= (n)/90){
				int p = seled.length;
				out.println(p);
				for(int i = 0;i < p;i++){
					out.print(seled[i][2]+1 + " ");
				}
				out.println();
				return;
			}
			for(int[] c : co){
				int d = c[0]; c[0] = c[1]; c[1] = -d;
			}
		}
		for(int i = 0;i < n;i++){
			co[i][1] = -co[i][1];
		}
		for(int K = 0;K < 4;K++){
			int[][] seled = go(co);
			if(seled.length >= (n)/90){
				int p = seled.length;
				out.println(p);
				for(int i = 0;i < p;i++){
					out.print(seled[i][2]+1 + " ");
				}
				out.println();
				return;
			}
			for(int[] c : co){
				int d = c[0]; c[0] = c[1]; c[1] = -d;
			}
		}
		
		Random gen = new Random();
		double[][] xco = new double[n][3];
		while(true){
//			double[][] xco = new double[n][];
			double theta = gen.nextDouble() * Math.PI * 2;
			double st = Math.sin(theta);
			double ct = Math.cos(theta);
			for(int i = 0;i < n;i++){
				xco[i][0] = ct * co[i][0] - st * co[i][1];
				xco[i][1] = st * co[i][0] + ct * co[i][1];
				xco[i][2] = i;
//				xco[i] = new double[]{
//						ct * co[i][0] - st * co[i][1],
//						st * co[i][0] + ct * co[i][1],
//						i
//				};
			}
			
			double[][] seled = go(xco);
			if(seled.length >= (n+89)/90){
				int p = seled.length;
				out.println(p);
				for(int i = 0;i < p;i++){
					out.print((int)seled[i][2]+1 + " ");
				}
				out.println();
				return;
			}
		}
	}
	
	int[][] go(int[][] co)
	{
		int n = co.length;
		int[][] seled = new int[n][];
		Arrays.sort(co, new Comparator<int[]>() {
			public int compare(int[] a, int[] b) {
				if(a[0] != b[0])return a[0] - b[0];
				return a[1] - b[1];
			}
		});

		int p = 0;
		int k = 0;
		outer:
		for(int i = 0;i < n;i++){
			for(int j = k;j < p;j++){
				if(seled[j][0] <= co[i][0] - 10){
					k++;
					continue;
				}
				if(d2(co[i], seled[j]) < 100-1e-9)continue outer;
			}
			seled[p++] = co[i];
		}
		return Arrays.copyOf(seled, p);
	}
	
	public static long d2(int[] a, int[] b) { return (long)(b[0]-a[0])*(b[0]-a[0])+(long)(b[1]-a[1])*(b[1]-a[1]); }
	
	double[][] go(double[][] co)
	{
		int n = co.length;
		double[][] seled = new double[n][];
		Arrays.sort(co, new Comparator<double[]>() {
			public int compare(double[] a, double[] b) {
				return Double.compare(a[0], b[0]);
			}
		});

		int p = 0;
		int k = 0;
		outer:
		for(int i = 0;i < n;i++){
			for(int j = k;j < p;j++){
				if(seled[j][0] <= co[i][0] - 10){
					k++;
					continue;
				}
				if(d2(co[i], seled[j]) < 100-1e-9)continue outer;
			}
			seled[p++] = co[i];
		}
		return Arrays.copyOf(seled, p);
	}
	
	public static double d2(double[] a, double[] p)
	{
		return ((a[0]-p[0])*(a[0]-p[0])+(a[1]-p[1])*(a[1]-p[1]));
	}

	
	void run() throws Exception
	{
//		int n = 500, m = 99999;
//		Random gen = new Random();
//		StringBuilder sb = new StringBuilder();
//		sb.append(n*n + " ");
//		for (int i = 0; i < n; i++) {
//			for(int j = 0;j < n;j++){
//				sb.append(i + " " + j + "\n");
//			}
//		}
//		INPUT = sb.toString();

		
		is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
		out = new PrintWriter(System.out);
		
		long s = System.currentTimeMillis();
		solve();
		out.flush();
		if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
//		Thread t = new Thread(null, null, "~", Runtime.getRuntime().maxMemory()){
//			@Override
//			public void run() {
//				long s = System.currentTimeMillis();
//				solve();
//				out.flush();
//				if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
//			}
//		};
//		t.start();
//		t.join();
	}
	
	public static void main(String[] args) throws Exception { new C2().run(); }
	
	private byte[] inbuf = new byte[1024];
	public int lenbuf = 0, ptrbuf = 0;
	
	private int readByte()
	{
		if(lenbuf == -1)throw new InputMismatchException();
		if(ptrbuf >= lenbuf){
			ptrbuf = 0;
			try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); }
			if(lenbuf <= 0)return -1;
		}
		return inbuf[ptrbuf++];
	}
	
	private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); }
	private int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; }
	
	private double nd() { return Double.parseDouble(ns()); }
	private char nc() { return (char)skip(); }
	
	private String ns()
	{
		int b = skip();
		StringBuilder sb = new StringBuilder();
		while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ')
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}
	
	private char[] ns(int n)
	{
		char[] buf = new char[n];
		int b = skip(), p = 0;
		while(p < n && !(isSpaceChar(b))){
			buf[p++] = (char)b;
			b = readByte();
		}
		return n == p ? buf : Arrays.copyOf(buf, p);
	}
	
	private int[] na(int n)
	{
		int[] a = new int[n];
		for(int i = 0;i < n;i++)a[i] = ni();
		return a;
	}
	
	private long[] nal(int n)
	{
		long[] a = new long[n];
		for(int i = 0;i < n;i++)a[i] = nl();
		return a;
	}
	
	private char[][] nm(int n, int m) {
		char[][] map = new char[n][];
		for(int i = 0;i < n;i++)map[i] = ns(m);
		return map;
	}
	
	private int[][] nmi(int n, int m) {
		int[][] map = new int[n][];
		for(int i = 0;i < n;i++)map[i] = na(m);
		return map;
	}
	
	private int ni() { return (int)nl(); }
	
	private long nl()
	{
		long num = 0;
		int b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}
		
		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}
	
	private static void tr(Object... o) { System.out.println(Arrays.deepToString(o)); }
}