import sys
import logging
import math
input = sys.stdin.readline
logger = logging.getLogger(__name__)


def read():
    N = int(input().strip())
    AB = []
    for i in range(N):
        a, b = map(int, input().strip().split())
        AB.append((a, b))
    return N, AB


def solve(N, AB):
    for a, b in AB:
        v = math.floor(math.sqrt(a) + math.sqrt(b))
        xs = (v-4, v-3, v-2, v-1, v, v+1, v+2, v+3, v+4)
        left = a * b * 4
        for x_i in xs:
            right = (x_i * x_i - a - b) * (x_i * x_i - a - b)
            if left < right:
                ans = x_i
                break
        print(ans)


if __name__ == "__main__":
    inputs = read()
    outputs = solve(*inputs)
    if outputs is not None:
        print("%s" % str(outputs))