缺省源

//#pragma GCC optimize(3,"Ofast","inline")
#include <bits/stdc++.h>
using namespace std;  

#define int long long
#define pii pair<int,int>
#define mkp make_pair
#define fi first
#define se second
#define pb push_back
#define lowbit(x) ((x)&(-x))

#define ppc __builtin_popcount

#define lc(p) ((p)<<1)
#define rc(p) ((p)<<1|1)

#define sqr(x) ((x)*(x))

// #define mod 1000000007
// #define mod 998244353
#define eps 1e-10

#define debug cout<<__LINE__<<" "<<__FUNCTION__<<"\n";
#define spa putchar(' ')
#define ero putchar('\n')

mt19937 rnd(time(0));

constexpr int N=1e6+10,inf=1e18;

int task;

inline int read(){
	int x=0,f=1;char ch=getchar();
	while (ch<'0'||ch>'9'){if (ch=='-') f=-1;ch=getchar();}
	while (ch>='0'&&ch<='9'){x=x*10+ch-48;ch=getchar();}
	return x*f;
}
inline void write(int x){
	if(!x)putchar('0');
	if(x<0)x=-x,putchar('-');
	int cnt=0,a[30];
	while(x)a[++cnt]=x%10,x/=10;
	while(cnt--)putchar(a[cnt+1]+'0');
}


void solve(){
    
}

signed main(){
	// freopen(".in","r",stdin);
	// freopen(".out","w",stdout);
	// ios::sync_with_stdio(0),cin.tie(0),cout.tie(0); 
    // task=read();
    // int T=read();
    int T=1;
    while(T--){
        solve();
    }
	return 0;
}