import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        String result = IntStream.range(0, n)
            .mapToObj(i -> String.valueOf(calc(sc.nextInt(), sc.nextInt())))
            .collect(Collectors.joining("\n"));
        System.out.println(result);
    }
    
    static long calc(long a, long b) {
        long left = 0;
        long right = Integer.MAX_VALUE;
        while (right - left > 1) {
            long m = (left + right) / 2;
            if (4 * a * b < Math.pow(m * m - a - b, 2)) {
                right = m;
            } else {
                left = m;
            }
        }
        return right;
    }
}
class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}