2013
11-13

# Cow Multiplication

Bessie is tired of multiplying pairs of numbers the usual way, so she invented her own style of multiplication. In her style, A*B is equal to the sum of all possible pairwise products between the digits of A and B. For example, the product 123*45 is equal to 1*4 + 1*5 + 2*4 + 2*5 + 3*4 + 3*5 = 54. Given two integers A and B (1 ≤ A, B ≤ 1,000,000,000), determine A*B in Bessie’s style of multiplication.

* Line 1: Two space-separated integers: A and B.

* Line 1: A single line that is the A*B in Bessie’s style of multiplication.

123 45



54


(1)
import java.util.Scanner;
public class Main{
public static void main(String[] args) {
Scanner scanner=new Scanner(System.in);
String str1=scanner.next();
String str2=scanner.next();
char[] array1=str1.toCharArray();
char[] array2=str2.toCharArray();
int sum1=0;
for(int i=0;i< array1.length;i++){
sum1+=array1[i]-48;
}

int sum2=0;
for(int i=0;i< array2.length;i++){
sum2+=array2[i]-48;
}

System.out.println(""+(sum1*sum2));
}
}

import java.util.*;

public class Main {

/**
* @param args
*/
public static void main(String[] args) {
Scanner cin = new Scanner(System.in);

String[] str = null;
String a = null;
String b = null;

int numa = 0;
int numb = 0;

while (cin.hasNext())
{
numa = 0;
numb = 0;

str = cin.nextLine().split(" ");
a = str[0];
b = str[1];

for(int i = 0; i < a.length(); i++)
numa = numa + Integer.valueOf(""+a.charAt(i));

for(int j = 0; j < b.length(); j++)
numb = numb + Integer.valueOf(""+b.charAt(j));

System.out.println(numa * numb);

}
}

}