#include <iostream>
#include <fstream>

using namespace std;

ifstream f("sdo.in");
ofstream g("sdo.out");

int main()
{
    int n, a;  f >> n >> a;
    int b[n];
    f >> b[0];
    for(int i = 1; i < n; i++){
        f >> b[i];
        if(b[i-1] > b[i]){
                int aux = b[i-1];
                b[i-1] = b[i];
                b[i] = aux;
        }
    }

    f.close();

    int swp = 1;
    while(swp){
        swp = 0;
        for(int i = 1; i < n; i++){
            if(b[i-1] > b[i])
            {
                int aux = b[i-1];
                b[i-1] = b[i];
                b[i] = aux;
                swp = 1;
            }
        }
    }
    g << b[2];
    g.close();
    return 0;
}