81
9 4
6 8
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9 10
0 2
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7 7
10 5
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8 6
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1 1
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4 5
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2 0
0 6
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6 3
1 6
10 8
1 5
6 5
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9 0
7 3
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8 7
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3 0
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1 4
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6 2
9 7
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10 2
5 6
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2 3
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 54
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 72
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 71
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 1
100000 100000
 87
5 10
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10 6
1 0
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1 6
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8 9
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5 7
7 9
1 7
8 6
1 1
7 2
7 5
5 5
1 4
6 8
6 3

85
 0
 0
 14
 11
 51
 40
 0
 0
 101

import java.io.*;
import java.util.*;
import java.lang.reflect.*;


public class Main {

	static long CURRENT_TIME_NANO = System.nanoTime();

	public static void main(String[] args) throws Exception {

		int n = next();
		int[] x = new int[n];
		int[] y = new int[n];

		for (int i = 0; i < n; i++) {
			x[i] = next();
			y[i] = next();
		}

		TreeSet<Integer> sety = new TreeSet<Integer>();
		TreeSet<Integer> setx = new TreeSet<Integer>();

		for (int yy : y) sety.add(yy);
		for (int xx : x) setx.add(xx);
		
		int m = 100001;
		int[] count = new int[m];

		for (int i = 0; i < n; i++) count[x[i]]++;

		long[] num = new long[m];
		for (int i = 0; i < m; i++) num[i] = 1000000L * count[i] + i;
		Arrays.sort(num);
		int[] ordx = new int[m];
		for (int i = 0; i < m; i++) ordx[i] = (int)(num[i] % 1000000);
//		for (int i = m-1; i >= m-10; i--) sout(ordx[i]);

		HashSet<Integer>[] set = new HashSet[m];
		for (int i = 0; i < m; i++) set[i] = new HashSet<Integer>();
		for (int i = 0; i < n; i++) set[x[i]].add(y[i]);
		
		long  answ = 0;
		for (int i = 0; i < m; i++) {
			if (count[ordx[i]] < m - i) {
				ArrayList<Integer> bs = new ArrayList<Integer>();
				for (int a : set[ordx[i]]) {
					for (int b : bs) {
						for (int c = ordx[i] - (a - b); c <= ordx[i] + (a - b); c += 2*(a - b)) {
							if (c >= 0 && c < m) if (set[c].contains(a) && set[c].contains(b)) answ++;
						}
					}
					bs.add(a);
				}
			} else {
				for (int aa = i + 1; aa < m; aa++) {
					int a = ordx[aa];
					int b = ordx[i];
					int c = Math.abs(a - ordx[i]);
					
					for (int r : set[b])
						if (set[b].contains(r + c) && set[a].contains(r) && set[a].contains(r + c)) answ++;

				}
				
			}
		}

		out.println(answ);

		out.close();
	}
	
	static void printtime() {System.out.println((System.nanoTime() - CURRENT_TIME_NANO)*1e-9);}
	static void nexttime() {printtime(); CURRENT_TIME_NANO = System.nanoTime();}
	static PrintWriter out = new PrintWriter(System.out);
	
	static BufferedReader bufferedreader = new BufferedReader(new InputStreamReader(System.in));
	static StringTokenizer in = new StringTokenizer("");

	static String nextToken() throws Exception {
		if (!in.hasMoreTokens()) in = new StringTokenizer(bufferedreader.readLine());
		return in.nextToken();
	}

	static int next()  throws Exception {return Integer.parseInt(nextToken());};
	static int[] next(int n) throws Exception {
		int[] x = new int[n];
		for (int i = 0; i < n; i++) x[i] = next();
		return x;
	}
	static int[][] next(int n, int m) throws Exception {
		int[][] x = new int[n][];
		for (int i = 0; i < n; i++) x[i] = next(m);
		return x;
	}

	static long nextl() throws Exception {return Long.parseLong(nextToken());};
	static long[] nextl(int n) throws Exception {
		long[] x = new long[n];
		for (int i = 0; i < n; i++) x[i] = nextl();
		return x;
	}
	static long[][] nextl(int n, int m) throws Exception {
		long[][] x = new long[n][];
		for (int i = 0; i < n; i++) x[i] = nextl(m);
		return x;
	}

	static double nextd() throws Exception {return Double.parseDouble(nextToken());};
	static double[] nextd(int n) throws Exception {
		double[] x = new double[n];
		for (int i = 0; i < n; i++) x[i] = nextd();
		return x;
	}
	static double[][] nextd(int n, int m) throws Exception {
		double[][] x = new double[n][];
		for (int i = 0; i < n; i++) x[i] = nextd(m);
		return x;
	}

	static String nextline() throws Exception {
		in = new StringTokenizer("");
		return bufferedreader.readLine();
	}

	static void sout(long x) {System.out.println(x);}
	static void sout(String s) {System.out.println(s);}
	static void sout(int[] x) {for (int xx : x) System.out.print(xx + " "); System.out.println();}
	static void sout(long[] x) {for (long xx : x) System.out.print(xx + " "); System.out.println();}
	static void sout(int[][] x) {for (int[] xx : x) sout(xx); System.out.println();}
	static void sout(long[][] x) {for (long[] xx : x) sout(xx); System.out.println();}


}