package main

import (
	"fmt"
)

func main() {
	var N int
	var P float64

	fmt.Scan(&N, &P)

	if N >= 200 {
		fmt.Println(1)
	} else {
		pp := 0.0
		for i := 0; i < N; i++ {
			pp += (1 - pp) * P
		}
		fmt.Println(pp)
	}
}