Cow Multiplication
Time Limit: 1000MS | Memory Limit: 65536K | |
Total Submissions: 4282 | Accepted: 2847 |
Description
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.
Input
* Line 1: Two space-separated integers: A and B .
Output
* Line 1: A single line that is the A*B in Bessie's style of multiplication.
Sample Input
123 45
Sample Output
54
此种运算的思路即为ABC*XY = (A+B+C)*(X+Y),分开运算即可
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); } } }
发表评论
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