let abc = readLine()!.split(separator: " ").map{Int($0)!}
let (a,b,c,d) = (abc[0],abc[1],abc[2],abc[3])
let INF = 1001
var ans = INF
if a != 0{
   ans = min(ans,c/a)
}
if b != 0{
    ans = min(ans,d/b)
}
print(ans)