package main
import (
	"fmt"
)

func round(A float64) int {
	return int(A + .5)
}
func min(a int, b int) int {
	if a < b {
		return a
	}
	return b
}

func check(A, B, a, b int) bool {
	if A == int(round(100 * float64(a) / float64(a + b))) &&
	B == int(round(100 * float64(b) / float64(a + b))) {
		return true
	}
	return false
}

func main() {
	var A, B int
	fmt.Scanf("%d %d", &A, &B)
	mn := 200
	for a := 0; a <= 200; a++ {
		for b := 0; a + b <= 200; b++ {
			if a + b == 0 {
				continue
			}
			if check(A, B, a, b) {
				mn = min(mn, a + b)
			}
		}
	}
	fmt.Println(mn)
}