N = int(input())
for i in range(N):
    a, b = map(int, input().split())
    ok = 10 ** 18
    ng = 0
    subres = -2 * a * b + a * a + b * b

    while ng + 1 < ok:
        mid = (ok + ng) // 2
        mid_squared = mid * mid
        mid_fourth = mid_squared * mid_squared

        # 不要な累乗計算を事前に行うことで計算の繰り返しを減らす
        if mid_fourth - 2 * (a + b) * mid_squared + subres > 0:
            ok = mid
        else:
            ng = mid

    print(ok)