代码模板

贴这里，防丢。
会更新算法模板，坑会慢慢填。

写题模板

/*
    Author: Rainypaster(lhy)
    Time: 
    File: 
    Email: [email protected]
*/
#include <cstring>
#include <iostream>
#include <algorithm>
#include <cmath>
#include <bits/stdc++.h>

using namespace std;

namespace IO
{
    template<typename T>
    T read(T x)
    {
        T sum = 0, opt = 1;
        char ch = getchar();
        while(!isdigit(ch)) opt = (ch == '-') ? -1 : 1, ch = getchar();
        while( isdigit(ch)) sum = (sum << 1) + (sum << 3) + (ch ^ 48), ch = getchar();
        return sum * opt;
    }

}
#define read IO::read(0)
#define rep(i, n) for(int i = 1; i <= n; i ++)
#define repa(i, n) for(int i = 0; i < n; i ++)
#define repb(i, n) for(int i = 1; i <= n; i ++)
#define repc(i, n) for(int i = 0; i < n; i ++)
#define lson (u << 1)
#define rson (u << 1 | 1)
#define gcd(a, b) __gcd(a, b)

const int N = 1e5 + 5;


void solve()
{
    
}

int main()
{
    int T = 1;
    while(T -- ) solve();
    return 0;
}

时间复杂度