r, b = map(int, input().split())
hi = 1817121
lw = 0
while hi - lw > 1:
    mid = (hi + lw) // 2
    rr, bb = r, b
    for i in range(mid, 0, -1):
        if rr < bb:
            rr, bb = bb, rr
        if i * i <= bb:
            bb -= i * i
        else:
            rr -= i * i
    if min(rr, bb) >= 0:
        lw = mid
    else:
        hi = mid
print(lw)