import sys
input = lambda: sys.stdin.readline().rstrip()

def naive(A, B):
    ng = -1
    ok = (A+B)*2
    while abs(ng-ok) > 1:
        mid = (ok+ng)//2
        if mid*mid-A-B > 0 and 4*A*B < (mid*mid-A-B)**2:  # ここ頑張る
            ok = mid
        else:
            ng = mid
    return ok

def isqrt(n):
    # n <= X^2 なる最小の X を求める
    ng = 0
    ok = n*2
    while abs(ng-ok) > 1:
        mid = (ok+ng)//2
        if n <= mid*mid : # ここ頑張る
            ok = mid
        else:
            ng = mid
    return ok

def solve(A, B):
    # vA + vB < X
    # A + 2vAB + B < X2
    # 2vAB < X2 - A - B =: C
    # 4AB < C2
    iseq = True
    C = isqrt(4*A*B)
    iseq &= 4*A*B == C * C
    X = isqrt(C+A+B)
    iseq &= C+A+B == X * X
    return X+iseq

def main():
    # 入力
    N = int(input())
    for _ in range(N):
        A, B = map(int, input().split())
        # 計算・出力
        ans = solve(A, B)
        print(ans)

if __name__ == "__main__":
    main()
    from random import randint
    # for _ in range(10000):
    #     A = randint(1, 10**9)
    #     B = randint(1, 10**9)
    #     ans1 = naive(A, B)
    #     ans2 = solve(A, B)
    #     if ans1 != ans2:
    #         print(A, B)
    #         print(ans1, ans2)
    #         break