import java.util.Scanner;
public class Main {
public static void main
(String[] args
) { Scanner sc
= new Scanner
(System.
in); int L = sc.nextInt();
int A = sc.nextInt();
int B = sc.nextInt();
int C = sc.nextInt();
int D = sc.nextInt();
int result = 0;
int ko = A/C;
int math = B/D;
result
= Math.
max(ko, math
); if (A%C != 0 || B%D != 0) {result+=1;}
}
}
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