N,M = map(int,input().split())

diff = 0
mem = [-1]*(N+1)
mem[1]=1
mem[2]=1
def f(n):
    if mem[n]!=-1:
        return mem[n]
    
    mem[n] = f(n-1)+f(n-2)
    return mem[n]

diff = f(N)-M

ans = 0
while diff>0:
    
    now = 1
    while f(now) <= diff:
        now += 1
    
    now -= 1
    ans += 1
    diff -= f(now)
print(ans)