from itertools import count
from math import sqrt
import sys


def printe(*args, end="\n", **kwargs):
    print(*args, end=end, file=sys.stderr, **kwargs)


def main():
    N = int(input())
    for _ in range(N):
        A, B = map(int, input().split())
        X_floor = sqrt(A) + sqrt(B)

        for num in count(int(X_floor - 3)):
            if num < 1:
                continue
            if num**2 - A - B <= 0:
                continue
            if 4 * A * B < (num**2 - A - B)**2:
                print(num)
                break

    # A+B+2√AB < X^2
    # 2√AB < X^2-A-B
    # 4AB < (X^2-A-B)^2


if __name__ == "__main__":
    main()