#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    int t,k;
    cin>>t>>k;
    int c=0,c1=0;
    int a[t];
    for(int i=0;i<t;i++)
        {
        cin>>a[i];
        if(a[i]==0)c++;
        if(a[i]!=0)c1++;
    }
    if(c==t)cout<<0;
    else if(c1==t  )cout<<1;
   
    
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    return 0;
}