package cy.poj;
import java.util.Scanner;
public class POJ {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner is=new Scanner(System.in);
int total=is.nextInt();
System.out.println(total);
for (int i=0; i<total;i++)
{
int m=is.nextInt();
int n=is.nextInt();
System.out.println(m*n-1);
}
}
}