import java.util.Scanner

//
fun _Do() {
    
    val N = scan.nextInt()
    val M = scan.nextInt()
    
    var fib = 0L
    var fprev = 0L
    var f = 1L
    for(i in 1 until N) {
        when (i) {
            1 -> 0
            else -> {
                fib = fprev+f
                fprev = f
                f = fib
            }
        }
    }

    println( fib % M )
  
}

var scan = Scanner(System.`in`)
fun main( argv : Array<String> ) {
    _Do()
}