import strutils,sequtils
var m : int64

type
    Matrix[H,W: static[int]] = 
        array[1..H,array[1..W,int64]]
proc `+`[H,W](a,b:Matrix[H,W]):Matrix[H,W] =
    for i in 1..high(a):
        for j in 1..high(a[0]):
            result[i][j] = a[i][j] + b[i][j]
proc `*`[Ha,Wa,Wb](a:Matrix[Ha,Wa],b:Matrix[Wa,Wb]):Matrix[Ha,Wb] =
    var k : int64
    for i in 1.. Ha:
        for j in 1..Wb:
            k = 0
            for ai in 1..Wa:
                k = (k + a[i][ai] * b[ai][j]) mod m
            result[i][j] = k
proc powMatrix[W,H](a : Matrix[W,H], n : int64):Matrix[W,H] =
    if n == 1:
        return a
    if n mod 2 == 0:
        return powMatrix(a * a,n div 2)
    else:
        return powMatrix(a * a,n div 2) * a
proc printMatrix(A: Matrix)=
    for a in A:
        echo a.join(", ")
proc fib(n : int64): int64 =
    if n == 0:
        return 0
    var
        A : Matrix[2,2] = [[1.int64,1.int64],[1.int64,0.int64]]
    return (powMatrix(A,n))[2][1]
var
    N,ans : int64
    L : seq[int64]
L = stdin.readline.split.map(parseBiggestInt)
(N, m) = (L[0],L[1])
ans = fib(N - 1)
echo ans