import sys
from math import gcd, factorial as fact,hypot,acos,atan2,pi,ceil,sqrt,log2,isqrt,log,dist,perm,comb,prod,exp
try: from math import lcm
except: lcm = lambda a,b: a//gcd(a,b)*b
from heapq import *
from itertools import *
try:
	from functools import cache
except:
	from functools import lru_cache
	def cache(user_function, /):
		return lru_cache(maxsize=None)(user_function)
from functools import reduce, cmp_to_key
from bisect import bisect_left, bisect_right
from collections import deque, Counter, defaultdict
from fractions import Fraction as frac
import typing
import operator
try:
	from tqdm import trange
except:
	trange = range

# import pypyjit
# pypyjit.set_param(max_unroll_recursion=-1,vec=1)
sys.setrecursionlimit(10**5+10)

input = lambda: sys.stdin.readline().strip()
def read(fn=int):
	return map(fn,input().split())
def read(*fn):
	if not fn: fn = [int]
	l = input().split()
	if len(fn) == 1: return map(fn[0], l)
	return (f(x) for f,x in zip(fn,l))

def dbg(*args,**kwargs):
	print(*args,**kwargs,file=sys.stderr)

class ostream():
	def __lshift__(self,s):
		sys.stdout.write(str(s))
		return self
cout = ostream()
endl = '\n'

yes = 'YES'
no = 'NO'

# toks = (tok for tok in sys.stdin.read().split())
# def rd(fn=int): return fn(next(toks))
# def rdn(n,fn=int): return (rd(fn) for _ in range(n))

mod = 998244353
mod = 10**9 + 7

def mul(a,b,mod=0):
	if sum(map(sum,a)) == 0 or sum(map(sum,b)) == 0:
		return [[0]*len(b[0]) for _ in range(len(a))]
	c = [[0 for j in range(len(b[0]))] for i in range(len(a))]
	for i in range(len(a)):
		for k in range(len(b)):
			for j in range(len(b[0])):
				c[i][j] += a[i][k]*b[k][j]
				if mod: c[i][j] %= mod
	return c

def power(x,y,mod=0):
	n = len(x)
	res = [[+(i==j) for j in range(n)] for i in range(n)]
	while y:
		if y % 2: res = mul(res,x,mod)
		x = mul(x,x,mod)
		y //= 2
	return res	
 
def sieve(n):
	primes = []
	isp = [1] * (n+1)
	isp[0] = isp[1] = 0
	for i in range(2,n+1):
		if isp[i]:
			primes += [i]
			for j in range(i*i,n+1,i):
				isp[j] = 0
	return primes

def eea(a,b):
	if not a: return b,0,1
	g,x,y = eea(b%a,a)
	return g, y - (b//a)*x, x

def factorials(n,mod):
	facs = [1 % mod]
	for i in range(n):
		facs += [facs[-1] * (i+1) % mod]
	invs = [pow(facs[-1], -1, mod)]
	for i in range(n):
		invs += [invs[-1] * (n-i) % mod]
	invs.reverse()
	return facs, invs

def _ceil_pow2(n):
	x = 0
	while (1 << x) < n:
		x += 1

	return x

def _bsf(n):
	x = 0
	while n % 2 == 0:
		x += 1
		n //= 2

	return x

class FenwickTree:
	def __init__(self, n = 0):
		self._n = n
		self.data = [0] * n

	def add(self, p, x):
		assert 0 <= p < self._n

		p += 1
		while p <= self._n:
			self.data[p - 1] += x
			p += p & -p

	def sum(self, left, right):
		assert 0 <= left <= right <= self._n

		return self._sum(right) - self._sum(left)

	def _sum(self, r: int):
		s = 0
		while r > 0:
			s += self.data[r - 1]
			r -= r & -r

		return s

class SegTree:
	def __init__(self,
				 op: typing.Callable[[typing.Any, typing.Any], typing.Any],
				 e: typing.Any,
				 v: typing.Union[int, typing.List[typing.Any]]) -> None:
		self._op = op
		self._e = e

		if isinstance(v, int):
			v = [e] * v

		self._n = len(v)
		self._log = _ceil_pow2(self._n)
		self._size = 1 << self._log
		self._d = [e] * (2 * self._size)

		for i in range(self._n):
			self._d[self._size + i] = v[i]
		for i in range(self._size - 1, 0, -1):
			self._update(i)

	def set(self, p: int, x: typing.Any) -> None:
		assert 0 <= p < self._n

		p += self._size
		self._d[p] = x
		for i in range(1, self._log + 1):
			self._update(p >> i)

	def get(self, p: int) -> typing.Any:
		assert 0 <= p < self._n

		return self._d[p + self._size]

	def prod(self, left: int, right: int) -> typing.Any:
		assert 0 <= left <= right <= self._n
		sml = self._e
		smr = self._e
		left += self._size
		right += self._size

		while left < right:
			if left & 1:
				sml = self._op(sml, self._d[left])
				left += 1
			if right & 1:
				right -= 1
				smr = self._op(self._d[right], smr)
			left >>= 1
			right >>= 1

		return self._op(sml, smr)

	def all_prod(self) -> typing.Any:
		return self._d[1]

	def max_right(self, left: int,
				  f: typing.Callable[[typing.Any], bool]) -> int:
		assert 0 <= left <= self._n
		assert f(self._e)

		if left == self._n:
			return self._n

		left += self._size
		sm = self._e

		first = True
		while first or (left & -left) != left:
			first = False
			while left % 2 == 0:
				left >>= 1
			if not f(self._op(sm, self._d[left])):
				while left < self._size:
					left *= 2
					if f(self._op(sm, self._d[left])):
						sm = self._op(sm, self._d[left])
						left += 1
				return left - self._size
			sm = self._op(sm, self._d[left])
			left += 1

		return self._n

	def min_left(self, right: int,
				 f: typing.Callable[[typing.Any], bool]) -> int:
		assert 0 <= right <= self._n
		assert f(self._e)

		if right == 0:
			return 0

		right += self._size
		sm = self._e

		first = True
		while first or (right & -right) != right:
			first = False
			right -= 1
			while right > 1 and right % 2:
				right >>= 1
			if not f(self._op(self._d[right], sm)):
				while right < self._size:
					right = 2 * right + 1
					if f(self._op(self._d[right], sm)):
						sm = self._op(self._d[right], sm)
						right -= 1
				return right + 1 - self._size
			sm = self._op(self._d[right], sm)

		return 0

	def _update(self, k: int) -> None:
		self._d[k] = self._op(self._d[2 * k], self._d[2 * k + 1])

class LazySegTree:
	def __init__(
			self,
			op: typing.Callable[[typing.Any, typing.Any], typing.Any],
			e: typing.Any,
			mapping: typing.Callable[[typing.Any, typing.Any], typing.Any],
			composition: typing.Callable[[typing.Any, typing.Any], typing.Any],
			id_: typing.Any,
			v: typing.Union[int, typing.List[typing.Any]]) -> None:
		self._op = op
		self._e = e
		self._mapping = mapping
		self._composition = composition
		self._id = id_

		if isinstance(v, int):
			v = [e] * v

		self._n = len(v)
		self._log = _ceil_pow2(self._n)
		self._size = 1 << self._log
		self._d = [e] * (2 * self._size)
		self._lz = [self._id] * self._size
		for i in range(self._n):
			self._d[self._size + i] = v[i]
		for i in range(self._size - 1, 0, -1):
			self._update(i)

	def set(self, p: int, x: typing.Any) -> None:
		assert 0 <= p < self._n

		p += self._size
		for i in range(self._log, 0, -1):
			self._push(p >> i)
		self._d[p] = x
		for i in range(1, self._log + 1):
			self._update(p >> i)

	def get(self, p: int) -> typing.Any:
		assert 0 <= p < self._n

		p += self._size
		for i in range(self._log, 0, -1):
			self._push(p >> i)
		return self._d[p]

	def prod(self, left: int, right: int) -> typing.Any:
		assert 0 <= left <= right <= self._n

		if left == right:
			return self._e

		left += self._size
		right += self._size

		for i in range(self._log, 0, -1):
			if ((left >> i) << i) != left:
				self._push(left >> i)
			if ((right >> i) << i) != right:
				self._push(right >> i)

		sml = self._e
		smr = self._e
		while left < right:
			if left & 1:
				sml = self._op(sml, self._d[left])
				left += 1
			if right & 1:
				right -= 1
				smr = self._op(self._d[right], smr)
			left >>= 1
			right >>= 1

		return self._op(sml, smr)

	def all_prod(self) -> typing.Any:
		return self._d[1]

	def apply(self, left: int, right: typing.Optional[int] = None,
			  f: typing.Optional[typing.Any] = None) -> None:
		assert f is not None

		if right is None:
			p = left
			assert 0 <= left < self._n

			p += self._size
			for i in range(self._log, 0, -1):
				self._push(p >> i)
			self._d[p] = self._mapping(f, self._d[p])
			for i in range(1, self._log + 1):
				self._update(p >> i)
		else:
			assert 0 <= left <= right <= self._n
			if left == right:
				return

			left += self._size
			right += self._size

			for i in range(self._log, 0, -1):
				if ((left >> i) << i) != left:
					self._push(left >> i)
				if ((right >> i) << i) != right:
					self._push((right - 1) >> i)

			l2 = left
			r2 = right
			while left < right:
				if left & 1:
					self._all_apply(left, f)
					left += 1
				if right & 1:
					right -= 1
					self._all_apply(right, f)
				left >>= 1
				right >>= 1
			left = l2
			right = r2

			for i in range(1, self._log + 1):
				if ((left >> i) << i) != left:
					self._update(left >> i)
				if ((right >> i) << i) != right:
					self._update((right - 1) >> i)

	def max_right(
			self, left: int, g: typing.Callable[[typing.Any], bool]) -> int:
		assert 0 <= left <= self._n
		assert g(self._e)

		if left == self._n:
			return self._n

		left += self._size
		for i in range(self._log, 0, -1):
			self._push(left >> i)

		sm = self._e
		first = True
		while first or (left & -left) != left:
			first = False
			while left % 2 == 0:
				left >>= 1
			if not g(self._op(sm, self._d[left])):
				while left < self._size:
					self._push(left)
					left *= 2
					if g(self._op(sm, self._d[left])):
						sm = self._op(sm, self._d[left])
						left += 1
				return left - self._size
			sm = self._op(sm, self._d[left])
			left += 1

		return self._n

	def min_left(self, right: int, g: typing.Any) -> int:
		assert 0 <= right <= self._n
		assert g(self._e)

		if right == 0:
			return 0

		right += self._size
		for i in range(self._log, 0, -1):
			self._push((right - 1) >> i)

		sm = self._e
		first = True
		while first or (right & -right) != right:
			first = False
			right -= 1
			while right > 1 and right % 2:
				right >>= 1
			if not g(self._op(self._d[right], sm)):
				while right < self._size:
					self._push(right)
					right = 2 * right + 1
					if g(self._op(self._d[right], sm)):
						sm = self._op(self._d[right], sm)
						right -= 1
				return right + 1 - self._size
			sm = self._op(self._d[right], sm)

		return 0

	def _update(self, k: int) -> None:
		self._d[k] = self._op(self._d[2 * k], self._d[2 * k + 1])

	def _all_apply(self, k: int, f: typing.Any) -> None:
		self._d[k] = self._mapping(f, self._d[k])
		if k < self._size:
			self._lz[k] = self._composition(f, self._lz[k])

	def _push(self, k: int) -> None:
		self._all_apply(2 * k, self._lz[k])
		self._all_apply(2 * k + 1, self._lz[k])
		self._lz[k] = self._id

def solve2(case):
	q,w=read()
	l = [[*read()] for _ in range(q)]
	s={0}
	for i in range(q):
		x,y=l[i]
		l[i]=[max(x-y,0), min(x+y,w)]
		s |= {*l[i]}
	s=sorted(s)
	# print(s)
	d = {s[i]:i for i in range(len(s))}
	val = [0] * len(s)
	for i in range(len(s)-1):
		val[i] = s[i+1] - s[i]
	val[-1] = w - s[-1]
	# print(s,val)
	n = len(s)
	sz = isqrt(n)
	# print(n,sz,(n+sz-1)//sz)
	b = [0] * ((n+sz-1)//sz)
	# print(len(b), max(y//sz for _,y in l))
	f = [Counter() for _ in range((n+sz-1)//sz)]
	for i in range(len(s)):
		f[i//sz][0] += val[i]
	a = [0]*n
	seen = set()
	ans = w
	for x,y in l:
		x = d[x]
		y = d[y]
		# print(x,y)
		if (x,y) in seen:
			delta = -1
			seen.remove((x,y))
		else:
			delta = 1
			seen.add((x,y))
		
		bx = x // sz
		by = y // sz
		# print(bx,by)
		if bx == by:
			ans -= f[bx][-b[bx]]
			for i in range(x,y):
				f[bx][a[i]] -= val[i]
				a[i] += delta
				f[bx][a[i]] += val[i]
			ans += f[bx][-b[bx]]
		else:
			ans -= f[bx][-b[bx]]
			for i in range(x,(x+sz)//sz*sz):
				f[bx][a[i]] -= val[i]
				a[i] += delta
				f[bx][a[i]] += val[i]
			ans += f[bx][-b[bx]]
			
			ans -= f[by][-b[by]]
			for i in range(y//sz*sz,y):
				f[by][a[i]] -= val[i]
				a[i] += delta
				f[by][a[i]] += val[i]
			ans += f[by][-b[by]]

			for i in range(bx+1,by):
				ans -= f[i][-b[i]]
				b[i] += delta
				ans += f[i][-b[i]]
		
		# print(x,y)
		# print(bx,by)
		# print(delta)
		# print(b)
		# print(a)
		# print(f)
		# print(ans)
		print((w-ans) * 2**.5)
		# print()

def solve2(case):
	adj = []
	pre = []
	res = []
	order = []
	order_rev = []
	def ar_build(el):
		for _ in range(n):
			adj.append([])
			pre.append([])
			res.append(False)
		for i,(x,y) in enumerate(el):
			adj[x].append((y,i))
			adj[y].append((x,i))
	
	def ar_down(x, p=-1):
		# val = False
		# for y,ei in adj[x]:
		# 	if y != p:
		# 		val = val | ar_down(y,x)
		# 		pre[x].append(val)
		# return not val

		for x,p in order:
			val = False
			for y,_ in adj[x]:
				if y != p:
					val = val | (not pre[y][-1] if pre[y] else True)
					pre[x].append(val)
	
	def ar_up(x,p=-1):
		adj[x].reverse()
		for y,ei in adj[x]:
			if y == p: continue
			if pre[x]: pre[x].pop()
			res[y] = not ((res[x] or pre[x][-1]) if pre[x] else res[x])
			res[x] = res[x] or not (pre[y][-1] if pre[y] else False)
			ar_up(y,x)
		res[x] = not res[x]

		# for x,p in order_rev:

	
	def calc(el):
		ar_build(el)
		order.append((0,-1))
		order_rev.append((0,-1))
		vis = [0] * n
		vis_rev = [0] * n
		ptr = 0
		while ptr < len(order):
			v,p = order[ptr]
			vis[v] = 1
			for vv,_ in adj[v]:
				if not vis[vv]:
					order.append((vv,v))

			v,p = order_rev[ptr]
			vis_rev[v] = 1
			for vv,_ in reversed(adj[v]):
				if not vis_rev[vv]:
					order_rev.append((vv,v))

			ptr += 1
		order.reverse()
		order_rev.reverse()
		print(order)
		ar_down(0)
		ar_up(0)

	n,q = read()
	el = []
	for _ in range(n-1):
		x,y=read()
		el.append((x-1,y-1))

	calc(el)

	for x in read():
		print('Hermione' if res[x-1] else 'Ron')

# def matmul(a,b,mod=0):
# 	c = [[0]*len(b[0]) for i in range(len(a))]
# 	for i in range(len(a)):
# 		for k in range(len(b)):
# 			for j in range(len(b[0])):
# 				c[i][j] += a[i][k]*b[k][j]
# 				if mod: c[i][j] %= mod
# 	return c

# def comb(x,y):
# 	(x0,),(x1,),(x2,) = x
# 	(y0,),(y1,),(y2,) = y
# 	return [[(x1+x2)*(y1+y2)], [(x0+y0+x0*y2+x2*y0)], [(x0*y1 + x1*y0)]]

# def solve(case):
# 	for m in range(3**9):
# 		l = []
# 		for _ in range(9):
# 			l+=[m%3]
# 			m//=3
# 		l.reverse()
# 		a,b,c,d,e,f,g,h,i = l

# 		T = [[a,b,c],[d,e,f],[g,h,i]]
# 		for v in range(3**6):
# 			x,y = divmod(v,3**3)
# 			xa,xb,xc = x//9, x//3%3, x%3
# 			X = [[xa],[xb],[xc]]
# 			ya,yb,yc = y//9, y//3%3, y%3
# 			Y = [[ya],[yb],[yc]]
				
# 			XY = comb(X,Y)
# 			TXY = matmul(T,XY)
# 			TX = matmul(T,X)
# 			TY = matmul(T,Y)
# 			if TXY != comb(TX,TY):
# 				break
# 		else:
# 			print(T)

def comb(x,y):
	(x0,x1,x2), = x
	(y0,y1,y2), = y
	return [[(x1+x2)*(y1+y2), x0*y0+x0*y2+x2*y0, x0*y1+x1*y0]]

def solve2(case):
	# for m in trange(5**9):
	# 	l = []
	# 	for _ in range(9):
	# 		l+=[m%5-2]
	# 		m//=5
	# 	l.reverse()
	# 	a,b,c,d,e,f,g,h,i = l
	# 	if a*e*i + b*f*g + c*d*h - c*e*g - b*d*i - a*f*h == 0: continue

	# 	T = [[a,b,c],[d,e,f],[g,h,i]]
	# 	for v in range(3**6):
	# 		x,y = divmod(v,3**3)
	# 		xa,xb,xc = x//9, x//3%3, x%3
	# 		X = [[xa, xb, xc]]
	# 		ya,yb,yc = y//9, y//3%3, y%3
	# 		Y = [[ya, yb, yc]]
				
	# 		V1 = matmul(comb(X,Y),T)[0]
	# 		TX = matmul(X,T)[0]
	# 		TY = matmul(Y,T)[0]
	# 		V2 = [TX[0] * TY[0], TX[1] * TY[1], TX[2] * TY[2]]
	# 		if V1 != V2:
	# 			break
	# 	else:
	# 		print(T)

	
	n,k = read()
	events = []
	ranges = []
	for i in range(n):
		a,b=read()
		events.append([a,-1,i])
		events.append([b,1,i])
		ranges.append([a,b])
	events.sort()
	# print(events)
	mx = 0
	c = 0
	pv = -1
	for x,f,i in events:
		if f == 1:
			c -= 1
			if pv != -1:
				mx = max(mx, x-pv+1)
			if c < k:
				pv = -1
		else:
			c += 1
			if pv == -1 and c >= k:
				pv = x
	# print(mx)
	if mx == 0:
		print(0)
		print(*range(1,k+1))
		return
	
	c = 0
	pv = -1
	active = set()
	for x,f,i in events:
		if f == 1:
			c -= 1
			if pv != -1 and x-pv+1 == mx:
				print(mx)
				# print(*sorted(active)[:k])
				l = sorted(active,key=lambda x:ranges[x-1][0])
				print(*l[:k])
				return
			if c < k:
				pv = -1
			active.remove(i+1)
		else:
			c += 1
			active.add(i+1)
			if pv == -1 and c == k:
				pv = x

def matmul(a,b,mod=0):
	c = [[0]*len(b[0]) for i in range(len(a))]
	for i in range(len(a)):
		for k in range(len(b)):
			for j in range(len(b[0])):
				c[i][j] += a[i][k]*b[k][j]
				if mod: c[i][j] %= mod
	return c

def matpowmul(x,y,v,mod=0):
	while y:
		if y % 2: v = matmul(x,v,mod)
		x = matmul(x,x,mod)
		y //= 2
	return v
	
def solve(case):
	p,q=read()
	t = frac(p,q)
	a,b,c,d = 0,1,1,1
	v = 2**30
	while v:
		if frac(a+v,b+v) < t:
			a += v
			b += v
		v //= 2
	v = 2**30
	while v:
		if frac(1,d+v) > t:
			d += v
		v //= 2
	while b+d < q:
		e,f = a+c,b+d
		if frac(e,f) == t:
			break
		if frac(e,f) < t:
			a,b = e,f
		else:
			c,d = e,f
	print(a+b+c+d)
 
if __name__ == '__main__':
	t = 1
	# t = -1
	# t, = read()
	for i in range(1,t+1):
		solve(i)
		t -= 1