sherlockandsquares

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;

public class Solution {

    // Complete the squares function below.
    static int squares(int a, int b) {
        double c = Double.valueOf(a);
        double d = Double.valueOf(b);
        double e = Math.sqrt(c);
        double f = Math.sqrt(d);
        double g = Math.ceil(e);
        double h = Math.floor(f);
        int counter = 0;
        for(int i = 0; i <= (h - g); i++){
            double z = g + i;
            if((z*z) <= b){
                counter++;
            }
        }
        return counter;
        
    }

    private static final Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) throws IOException {
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        int q = scanner.nextInt();
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");

        for (int qItr = 0; qItr < q; qItr++) {
            String[] ab = scanner.nextLine().split(" ");

            int a = Integer.parseInt(ab[0]);

            int b = Integer.parseInt(ab[1]);

            int result = squares(a, b);

            bufferedWriter.write(String.valueOf(result));
            bufferedWriter.newLine();
        }

        bufferedWriter.close();

        scanner.close();
    }
}