#include<iostream>
using namespace std;
int main(){
    int a;
    cin>>a;
    if(a>=10&&a<=99){
        cout << 1;
    }else{
        cout << 0;
    }
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    if(n>=10&&n<=99) cout<<1;
    else cout<<0;
    return 0;
}