32 lines
805 B
Java
32 lines
805 B
Java
package com.thinker.bishi.toutiao;
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import java.util.Scanner;
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/**
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* @author lzh
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*/
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public class Main1 {
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private static int[] changeToArray(String[] strArray, int len) {
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int[] arr = new int[len];
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for (int i = 0; i < len; i++) {
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arr[i] = Integer.parseInt(strArray[i]);
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}
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return arr;
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}
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public static void main(String[] args) {
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Scanner in = new Scanner(System.in);
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int len = Integer.parseInt(in.nextLine());
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String[] strArr = in.nextLine().split(" ");
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int[] arr = changeToArray(strArr,len);
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int count = 0;
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for(int i=0;i<len;i++){
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for(int j=i+1;j<len;j++){
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if(Math.abs((arr[i] - arr[j])) <= 10){count ++;}
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}
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}
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System.out.println(count);
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}
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}
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