package main

import (
	"fmt"
	"math"
)

func main() {
	var w, d float64
	fmt.Scan(&w, &d)
	D := int(d)
	//fmt.Println(w, d, D)
	for i := 0; i < D-1; i++ {
		//fmt.Println(i, D, w/(math.Pow(d, 2)))
		w -= float64(int(w / (math.Pow(d, 2))))
		d -= 1
	}
	fmt.Println(int(w))
}