n=int(input())
for j in range(n):
    a,b=map(int,input().split())
    co=0
    for i in reversed(range(35)):
        co+=2**i
        if co**2>4*a*b:
            co-=2**i
    cco=0
    for i in reversed(range(35)):
        cco+=2**i
        if cco**2>a+b+co:
            cco-=2**i
    print(cco+1)