import numpy as np

n,m=map(int,input().split())
mod=m

def seq_mat(A,k,mod):
  if k==1:
    return A
  else:
    if k%2==0:
      tmp=seq_mat(A,k//2,mod)
      ret=np.dot(tmp,tmp)
    else:
      tmp=seq_mat(A,k-1,mod)
      ret=np.dot(A,tmp)
    for i in range(2):
        for j in range(2):
          ret[i][j]%=mod
    return ret
      
A=np.array([[1,1],[1,0]])
if n<=2:
  print((n-1)%mod)
else:
  fib_n=seq_mat(A,n-2,mod)[0][0]
  print(fib_n)