def f(R, B):
    dp = [0 for _ in range(R + 1)]
    dp[0] = 1
    k = 1
    z = 0
    while True:
        flag = False
        ndp = [0 for _ in range(R + 1)]
        dp, ndp = ndp, dp
        for i in range(R + 1):
            if ndp[i] == 0:
                continue
            j = z - i
            if i + k**2 <= R and j <= B:
                dp[i + k**2] = 1
                flag = True
            if i <= R and j + k**2 <= B:
                dp[i] = 1
                flag = True
        if flag:
            z += k ** 2
            k += 1
        else:
            break

    return k - 1

def h(x):
    ok = 0
    ng = 10**18
    while ng - ok > 1:
        mid = (ok + ng) // 2
        if mid * (mid + 1) * (2 * mid + 1) // 6 <= x:
            ok = mid
        else:
            ng = mid
    return ok
R, B = map(int, input().split())

if R > B:
    R, B = B, R
if R < 128:
    print(f(R, B))
else:
    print(h(R + B))