n = int(input())
for i in range(n):
    a,b = map(int, input().split())
    high = 100000
    low = 0
    while(high-low>1):
        mid = (high+low)//2
        val = (mid*mid-a-b)
        v = val*val
        if v>4*a*b:
            high = mid
        else:
            low = mid
    print(high)