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#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/rope>
#define f first
#define s second
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define rsz resize
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define tr(a, x) for (auto& a : x)
#define mem(a, b) memset(a, (b), sizeof(a))
using namespace std; using namespace __gnu_pbds; using namespace __gnu_cxx;
using str = string; using ll = long long; using ld = long double; using cd = complex<ld>;
using ii = pair<int, int>; using pl = pair<ll, ll>; using pd = pair<ld, ld>;
using vi = vector<int>;    using vl = vector<ll>;   using vd = vector<ld>;
using vii = vector<ii>;    using vpl = vector<pl>;  using vpd = vector<pd>;
template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T> using ordered_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>; // Use with caution
constexpr ll MX = 1e5+5, ll INF = 1e9, LINF = 1e18, ll MOD = 1e9+7;
constexpr ld PI = 4*atan((ld)1);

int main() {
	if (fopen("in", "r")) freopen("in", "r", stdin), freopen("out", "w", stdout);
	ios_base::sync_with_stdio(0), cin.tie(0);
	
	
}