from bisect import *
from math import *
from collections import *
from heapq import *
from random import *
import numpy as np
import sys

sys.setrecursionlimit(10 ** 6)
int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def MI(): return map(int, sys.stdin.readline().split())
def MF(): return map(float, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LF(): return list(map(float, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]

def main():
    m,n=MI()
    g=np.gcd(m,n)
    m,n=m//g,n//g
    ans=0
    while (m,n)!=(1,1):
        if n==1:
            ans+=m-1
            break
        if m>n:
            p,r=divmod(m,n)
            ans+=p
            m=r
        else:
            m,n=n,m
            ans+=1
        if m*n==0:
            print(-1)
            exit()
    print(ans)

main()