PKU_ACM_3673_Cow Multiplication

http://acm.pku.edu.cn/JudgeOnline/problem?id=3673 原题

很简单题

import java.io.*;

import java.util.*;

public class Main

{

static int[] num1;

static int[] num2;

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

{

readFile();

process();

}

public static void readFile() throws Exception

{

BufferedReader br = new BufferedReader(

new InputStreamReader(System.in));

StringTokenizer st = new StringTokenizer(

br.readLine()," ");

String sTemp = st.nextToken();

num1 = new int[sTemp.length()];

for(int i=0; i<num1.length; i++)

{

num1[i] = Integer.valueOf(sTemp.charAt(i)-48);

}

sTemp = st.nextToken();

num2 = new int[sTemp.length()];

for(int i=0; i<num2.length; i++)

{

num2[i] = Integer.valueOf(sTemp.charAt(i)-48);

}

}

public static void process()

{

long sum = 0L;

for(int i=0; i<num1.length; i++)

{

for(int j=0; j<num2.length; j++)

{

sum += (num1[i]*num2[j]);

}

}

System.out.print(sum);

}

}