def solve(a, b):
    l = 1
    r = 1 << 30
    while r-l > 1:
        mid = (l+r)//2
        if mid**2 - a - b > 0 and 4*a*b < (mid**2 - a - b)**2:
            r = mid
        else:
            l = mid
    return r


N = int(input())
ans = []
for _ in range(N):
    A, B = map(int, input().split())
    ans.append(solve(A, B))
print(*ans, sep="\n")