n  = int(input())

for i in n:
    a, b = map(int, input().split())
    l = 0
    r = 1e7
    while l < r :
        x =  (l + r) // 2
        d = x * x - a - b
        if 4 * a * b < d * d and x * x > a + b:
            r = x
        else:
            l = x + 1
    print(l)