for _ in range(int(input())):
    a, b = map(int, input().split())
    ok = 70000
    ng = 2
    while ok - ng > 1:
        mid = (ok + ng) // 2
        res = mid * mid - a - b
        if res * res > 4 * a * b and mid * mid > a + b:
            ok = mid
        else:
            ng = mid
    print(ok)