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; static class Program{ const int mod=(int)1e9+7; const double eps=1e-11; static void Main(){ Sc sc=new Sc(); var s=sc.Ia; var a=sc.Ia; var b=sc.La; int lb=0,ub=mod,mid=0; while(lb+1!=ub){ mid=(ub+lb)/2; if(Fu(mid)>=s[1]){ub=mid;} else{lb=mid;} } Console.WriteLine("{0}",ub); long Fu(int n) { long p=0; 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