from collections import *
from itertools import *
from functools import *
from heapq import *
import sys,math
input = sys.stdin.readline

N = int(input())
for _ in range(N):
    a,b = map(int,input().split())
    
    is_ok = lambda x : 4*a*b < (x**2 - a - b)**2

    x = math.floor(math.sqrt(a)+math.sqrt(b))
    y = x + 100
    while y-x>1:
        mid = (y+x)//2
        if is_ok(mid):
            y = mid
        else:
            x = mid
    print(y)