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AC

//头文件
#include <bits/stdc++.h>
//#incldue <windows.h>

using namespace std;

//转换 
#define fst ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define endl '\n'
#define TRACE 1
#define tcout TRACE && cout
#define int long long
#define FALSE cout << "No";return 0;
#define TRUE cout << "Yes";return 0;
//#define ll long long
//#define ull unsigned long long

//定义 
const int P = 998244353;
const long long INF = 0x3f3f3f3f3f3f3f3f;
const int N = 1e9 + 10, M = 2e6 + 10;
const int dx[]={1,1,1,0,0,-1,-1,-1};
const int dy[]={-1,0,1,-1,1,-1,0,1};
//变量&&函数区 

signed main(void){
	
	return 0; 
}