import java.util.*;
class subarrayLtoRcontainsSet {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
 
        int n = scanner.nextInt(); // size of array b[]
        int[] b = new int[n + 1]; // array b[n+1]
        for (int i = 1; i <= n; i++) {
            b[i] = scanner.nextInt();
        }
 
        int l = scanner.nextInt();
        int r = scanner.nextInt(); // given limits
 
        int u = Integer.MAX_VALUE;
        for (int i = 1; i <= n; i++) {
            Set<Integer> s = new HashSet<>();
            for (int j = i; j <= n; j++) {
                //[i.....j]
                if (b[j] >= l && b[j] <= r) {
                    s.add(b[j]);
                }
                if (s.size() == Math.abs(r - l + 1)) {
                    //[i.....j] is a valid subarray
                    int length = Math.abs(j - i + 1);
                    u = Math.min(length, u);
                }
            }
        }
 
        System.out.println(u);
    }
}
 

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