N = int(input())
for i in range(N):
    A, B = map(int, input().split())

    # A**1/2 + B**1/2 < X
    # A + B + 2*(A*B)**1/2 < x**2
    # 2**(A*B)**1/2 < x**2 - A - B

    def solve(x):
        return 4*A*B < (x**2 - A - B)**2

    ok = int(A**(1/2)) + int(B**(1/2)) + 3
    ng = int(A**(1/2)) + int(B**(1/2))
    while abs(ok - ng) != 1:
        mid = (ok + ng)//2
        if solve(mid):
            ok = mid
        else:
            ng = mid
    print(ok)