输入两个正整数A, B，求[A, B]内完全平方数的个数。( 1 ≤ A ≤ B ≤ 10^9 ) 测试时输入有极大的数 Java解法

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            int A = sc.nextInt();
            int B = sc.nextInt();
            int count = 0;
            for (int i = 1; i * i <= B; i++) {
                if (i * i >= A) {
                    count++;
                }
            }
            System.out.println(count);
        }
    }
}

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            int A = sc.nextInt();
            int B = sc.nextInt();
            int count = 0;
            for (int i = 1; i * i <= B; i++) {
                if (i * i >= A) {
                    count++;
                }
            }
            System.out.println(count);
        }
    }
}