import math
N=int(input())
for _ in range(N):
    A,B=map(int,input().split())
    left,right=0,3*10**3
    while right-left>1:
        mid=(right+left)//2
        if 4*A*B<(mid**2-A-B)**2:
            right=mid
        else:
            left=mid
    print(int(right))