using System; using System.Collections.Generic; using System.Collections; using System.Collections.Specialized; using System.Linq; using System.Text; using System.IO; using System.Reflection; using static System.Math; using System.Numerics; using System.Threading; using System.Runtime.CompilerServices; static class Program{ const int mod=(int)1e9+7; static List[] li; static bool[] b; static int[] h; static void Main(){ Sc sc=new Sc(); var s=sc.Ia; int n=s[0],m=n-1; li=new List[n+1]; b=new bool[n+1]; h=new int[2]; for(int i=1;i<=n;i++){li[i]=new List();} for(int i=0;i(int n,Func f){var a=new T[n];for(int i=0;i(int n,Func f){var a=new T[n];for(int i=0;i(int n,Func f){var a=new T[n];for(int i=0;i(int n,Func f){var a=new T[n];for(int i=0;i