def issatisfy(m, a, b) -> bool:
    s = m**2 - (a + b)
    if s <= 0: return False
    x = 4 * a * b
    y = s ** 2
    return x < y


# INF = 1 << 60
INF = 10 ** 5
N = int(input())
for _ in range(N):
    A, B = map(int, input().split())

    lo = 1
    hi = INF
    ans = INF
    while lo <= hi:
        m = (lo + hi) // 2
        if issatisfy(m, A, B):
            ans = min(ans, m)
            hi = m - 1
        else:
            lo = m + 1
    print(ans)