大模板

#include <bits/stdc++.h>

#define pb push_back
#define fi first
#define se second

using namespace std;

const int INF = 0x3f3f3f3f;
const int MOD = 1e9 + 7;
const double eps = 1e-6;
const double PI = acos(-1);

const int N = 1e8 + 10;

int f[N], g[N];

typedef long long LL;
typedef pair<int, int> PII;

int main()
{
    ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    
    
    
    return 0;
}