import strutils, math

proc nextString: string =
    result = ""
    while not endOfFile stdin:
        let c = readChar stdin
        if c == ' ' or c == "\n"[0]: return
        elif c != '\r': add result, c

proc nextInt: int =
    parseInt nextString()


let
    minR, maxR = nextInt()

var
    ans = 0

for r in minR .. maxR:
    var cnt = 0
    for x in 0 .. int.high:
        if x * x >= r:
            break
        let Y = (r - x * x).toFloat
        if Y.sqrt.floor == Y.sqrt:
            cnt += 1
            ans = max(ans,cnt)

echo ans * 4