A - Bath Temperature

#include <bits/stdc++.h>

using namespace std;

int main() {
    int n, x;
    cin >> n >> x;
    int mn = 101;
    int mx = -1;
    for(int i = 0; i < n; i++) {
        int a;
        cin >> a;
        if(a == x) {
            cout << 1 << endl;
            return 0;
        }
        mn = min(mn, a);
        mx = max(mx, a);
    }
    cout << ((x > mn and x < mx) ? 2 : -1) << endl;
    return 0;
}