蓝桥杯2014年第五届真题-矩阵翻硬币 （Java代码）

解题思路:

注意事项:

参考代码:

import java.math.BigInteger;

import java.util.Scanner;

public class Main{

public static void main(String[] args) {

Scanner input=new Scanner(System.in);

BigInteger a=input.nextBigInteger(),b=input.nextBigInteger();

if(a.compareTo(new BigInteger("1"))==0&&b.compareTo(new BigInteger("1"))==0){

System.out.println(1);

return;

}

BigInteger c=a.mod(new BigInteger("2"));

BigInteger d=b.mod(new BigInteger("2"));

if(c.compareTo(d)==0){

System.out.println(a.multiply(b).subtract(new BigInteger("1")));

}else {

System.out.println(1);

}

return;

}

}