import java.util.*;
import java.io.*;

@SuppressWarnings("unused")
public class Main {

  private static void solve() {
    int n = ni();
    for (int i = 0; i < n; i ++) {
      solve(ni(), ni());
    }
  }

  private static void solve(long a, long b) {
    // a + b + 2sqrt(ab) < x^2
    // x^2 - a - b > 2sqrt(ab)
    // (x^2 - a- b)^2 > 4ab
    

    long ok = (int)Math.sqrt(1e9) * 2 + 100;
    long ng = 0;
    while (Math.abs(ok - ng) > 1) {
      long x = (ok + ng) / 2;
      long y = (x * x - a - b) * (x * x - a - b) - 4 * a * b;
      if (y > 0) {
        ok = x;
      } else {
        ng = x;
      }
    }
    out.println(ok);
  }

  public static void main(String[] args) {
    new Thread(null, new Runnable() {
      @Override
      public void run() {
        solve();
        out.flush();
      }
    }, "", 64000000).start();
  }

  private static PrintWriter out = new PrintWriter(System.out);
  private static StringTokenizer tokenizer = null;
  private static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in), 32768);

  public static String next() {
    while (tokenizer == null || !tokenizer.hasMoreTokens()) {
      try {
        tokenizer = new java.util.StringTokenizer(reader.readLine());
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
    }
    return tokenizer.nextToken();
  }

  private static double nd() {
    return Double.parseDouble(next());
  }

  private static long nl() {
    return Long.parseLong(next());
  }

  private static int[] na(int n) {
    int[] a = new int[n];
    for (int i = 0; i < n; i++)
      a[i] = ni();
    return a;
  }

  private static char[] ns() {
    return next().toCharArray();
  }

  private static long[] nal(int n) {
    long[] a = new long[n];
    for (int i = 0; i < n; i++)
      a[i] = nl();
    return a;
  }

  private static int[][] ntable(int n, int m) {
    int[][] table = new int[n][m];
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < m; j++) {
        table[i][j] = ni();
      }
    }
    return table;
  }

  private static int[][] nlist(int n, int m) {
    int[][] table = new int[m][n];
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < m; j++) {
        table[j][i] = ni();
      }
    }
    return table;
  }

  private static int ni() {
    return Integer.parseInt(next());
  }
}