#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef pair <ll, ll> pii; #define fi first #define se second #define pb push_back const int MOD = 1e9; const int MAX = 2e5 + 5; const int dx[4] = {0, 0, 1, -1}; const int dy[4] = {1, -1, 0, 0}; #define int ll signed main(){ ios_base::sync_with_stdio(0); cin.tie(0); int n; cin >> n; int a[n + 5]; for(int i = 1 ; i <= n ; i++)cin >> a[i]; cout << 0 << endl; return 0; }