#include<bits/stdc++.h>
using namespace std;

#define ll long long
#define copy(a,b) copy(begin(a),end(a),begin(b))
#define ld long double
#define dot(x) fixed<<setprecision(x)
#define foru(a,b,c) for(ll a=b;a<=c;a++)
#define N 100005

struct mirror{
    ll x,y;
}a[N];

ll n,xs,ys,xe,ye;

int main(){
    #ifndef bendibianyi
    #ifndef ONLINE_JUDGE
        freopen("lasers.in" ,"r",stdin );
        freopen("lasers.out","w",stdout);
    #endif
    #endif
    cout<<1;
    return 0;
}