#35745: 明明愛數數


108081a1@gm.chihlee.edu.tw (何姿儀)


while True:
    try:
        n, m = input().split()
    except:
        break
    n, m = int(n), int(m)
    answer = 0
    sum = 0
    while True:
        answer += 1
        sum += n
        if sum > m:
            break
        else:
            n += 1
    print(answer)