#include<bits/stdc++.h>

std::vector<std::vector<int64_t>> matrix_product(std::vector<std::vector<int64_t>> A,std::vector<std::vector<int64_t>>B,const int64_t mod)
{
  int64_t AH=A.size(),AW=A[0].size(),BH=B.size(),BW=B[0].size();
  assert(AW==BH);
  std::vector<std::vector<int64_t>> C(AH,std::vector<int64_t> (BW));
  for(int i=0;i<AH;i++)
  {
    for(int j=0;j<BW;j++)
    {
      for(int k=0;k<AH;k++)
      {
        C[i][j]+=A[i][k]*B[k][j];
      }
      C[i][j]%=mod;
    }
  }
  return C;
}

  int64_t pow_mod(int64_t a,int64_t n,int64_t mod)
  {
    assert(0<=n);
    int64_t res=1;
    while(0<n)
    {
      if(0<(n&1))
      {
        res=res*a%mod;
      }
      a=a*a%mod;
      n=n>>1;
    }
    return res;
  }

int64_t fibonacci(int64_t N,const int64_t mod)
{
  if(N==0)
  {
    return 0;
  }
  N--;
  std::vector<std::vector<int64_t>> F(2,std::vector<int64_t> (1)),A(2,std::vector<int64_t> (2)),B;
  F[0][0]=1,F[1][0]=0;
  A[0][0]=1,A[0][1]=1,A[1][0]=1,A[1][1]=0;
  B=A;
  while(0<N)
  {
    if((N&1))
    {
      A=matrix_product(A,B,mod);
    }
    B=matrix_product(B,B,mod);
    N>>=1;
  }
  return matrix_product(A,F,mod)[1][0];
}

int main()
{
  int64_t N,M;
  std::cin>>N>>M;
  N--;
  std::cout<<fibonacci(N,M)<<std::endl;
}