import java.util.Scanner;

public class Solution {
    public static void main(String[] args) {
        Scanner console = new Scanner(System.in);
        int max = Integer.MAX_VALUE;
        int max2 = Integer.MAX_VALUE;
        int first = 0;
        int second = 0;
        while (console.hasNextInt()) {
            int token = console.nextInt();
            if (token < max) {
                max = token;
                first = max;
            } else if (token < max2 && token > first) {
                max2 = token;
                second = max2;
            }
        }
        System.out.println(second);
    }
}