import sys
from math import sqrt, pi, sin, factorial, ceil, floor
BLANK = " "
inp = input
# inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
h = ii()
r = ii()
ln = floor((sqrt(3) * h / 2))
p(r // ln + int(r % ln > 0) - 1)
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()