#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double db;
typedef string str;
#define mp make_pair
#define f first
#define s second
typedef pair<int,int> pi;
typedef vector<int> vi;
typedef vector<long long> vll;
typedef vector<bool> vb;
typedef vector<pi> vpi;
#define all(x) begin(x), end(x)
#define sor(x) sort(all(x))
#define rsor(x) sort(x.rbegin(), x.rend())
#define pb push_back
#define forn(i,a,b) for (int i = (a); i < (b); ++i)
#define fors(i,a,b,s) for (int i = (a); i < (b); i+=s)
#define rofn(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define rep(n) for (int _ = 0; _ < n; _++)
#define each(x, a) for (auto& x: a)
#define debug(x) cout << #x << " = " << x << "\n";
#define vdebug(a) cout << #a << " = "; for(auto x: a) cout << x << " "; cout << "\n";
const int mod = 1e9+7;
const int INF = INT_MAX >> 1;
int add(int a, int b) {return (1LL * a + b) % mod;}
int mul(int a, int b) {return (1LL * a * b) % mod;}
ll n,D, a[300005];
int main () {
ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
cout<<0;
}
