import sys
input=sys.stdin.readline

n = int(input())
for i in range(n):
    a, b = map(int, input().split())
    c = a + b
    d = (a - b) ** 2
    hi = 10 ** 6
    lw = 0
    while hi - lw > 1:
        mid = (hi + lw) // 2
        if mid ** 4 - 2 * mid ** 2 * c - d > 0:
            hi = mid
        else:
            lw = mid
    print(hi)