华为机考题2017.docx

满分100得分40import java.util.Scanner;public class HuaWeiT public static void main(String args) Scanner s = new Scanner(System.in);int n;n = s.nextInt();System.out.println(1+n*(n-1)/2+n*(n-1)*(n-2)*(n-3)/24-n);满分200 得分200import java.math.BigInteger;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;public class Main public static void main(String args) BufferedReader br = new BufferedReader (new InputStreamReader(System.in);try String str = br.readLine();String a = str.split( )0;String b = str.split( )1;BigInteger num1 = new BigInteger(a);BigInteger num2 = new BigInteger(b);System.out.println(num1.subtract(num2);catch(IOException e)e.printStackTrace();满分300 得分未知import java.util.ArrayList;import java.util.HashSet;import java.util.Iterator;import java.util.List;import java.util.Scanner;import java.util.Set;public class Main public static void main(String args) int result;Scanner s = new Scanner(System.in);int n;int black;int white;n = Integer.valueOf(s.nextLine().intValue();result = new intn;String bw = s.nextLine();black = Integer.valueOf(bw.split( )0).intValue();white = Integer.valueOf(bw.split( )1).intValue();int b_array = new intblack2;int w_array = new intwhite2;for(int m=0;mn;m+)for(int i=0;iblack;i+)String str = s.nextLine();b_arrayi0 = Integer.valueOf(str.split( )0).intValue();b_arrayi1 = Integer.valueOf(str.split( )1).intValue();for(int j=0;jwhite;j+)String str = s.nextLine();w_arrayj0 = Integer.valueOf(str.split( )0).intValue();w_arrayj1 = Integer.valueOf(str.split( )1).intValue();int match =0;ArrayList ss = new ArrayList();for(int i=0;iblack;i+)boolean flag = false;for(int j=0;jwhite;j+)if(b_arrayi0=w_arrayj0 & b_arrayi1=w_arrayj1)flag = true;ss.add(j+);if(flag)match += 1;Set set = new HashSet(); List newList = new ArrayList(); for (Iterator iter = ss.iterator(); iter.hasNext();) Object element = iter.next(); if (set.add(element) newList.add(element); if(match newList.size() resul