for _ in range(int(input())):
    a, b = map(int, input().split())
    l = 0
    r = 63246
    S = a + b
    T = 4 * a * b
    while r - l > 1:
        x = (l + r) // 2
        x2 = x * x
        if x2 >= S and T < (x2 - S) ** 2:
            r = x
        else:
            l = x
    print(r)