n = int(input())

for i in range(n):
    a, b = list(map(int, input().split()))
    ng = int(1)
    ok = int(100000)

    while ok - ng > 1:
        c = (ok + ng) // 2
        if c * c - a - b <= 0:
            ng = c
            continue

        if 4 * a * b < (c * c - a - b) * (c * c - a - b):
            ok = c
        else:
            ng = c

    print(ok)