Sample Input
1 4
1 10
0 0
Sample Output
2
3



大意:給兩個數字 求範圍內平方不大於第二個數字的數量

解法: 以最大數取根號後往回看





import java.util.Scanner;

public class UVA11461 {

 public static void main(String[] args) {

  Scanner sc = new Scanner(System.in);

  while (sc.hasNext()) {

   int start = sc.nextInt();

   int last = sc.nextInt();

   if (last == 0)
    break;

   System.out.println((int) Math.sqrt(last)
     - (int) Math.ceil(Math.sqrt(start)) + 1);
  }

  sc.close();
 }

}