def main():
    N = int(input())
    for _ in range(N):
        A, B = map(int, input().split())
        max_x = int(1e9)
        min_x = 2
        while max_x - min_x > 1:
            mid_x = (max_x + min_x) // 2
            if 4 * A * B < (mid_x**2 - A - B)**2:
                max_x = mid_x
            else:
                min_x = mid_x
        print(max_x)

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


if __name__ == "__main__":
    main()