Submission #4047953

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Source Code Expand

using System;
using System.Linq;
using System.Collections.Generic;

public class Hello{
    public static void Main(){
        // Your code here!
        string S = Console.ReadLine();
        string[] divide = new string[]{"dream", "dreamer", "erase", "eraser"};
        
        S = string.Join("",S.Reverse());
        
        
        
        for(int i = 0; i < divide.Length; i++)
        {
            divide[i] = string.Join("", divide[i].Reverse());
        }
        bool can = true;
        
        for(int i = 0; i < S.Length;)
        {
            
            bool can2 = false;
            for(int j = 0; j < divide.Length; j++)
            {
                string d = divide[j];
                if(S.Length - i  < d.Length)
                {
                    continue;
                }
                else if(S.Substring(i, d.Length) == d) //divide[i]で分割できたら
                {
                    can2 = true;
                    i += d.Length;
                }
                
            }
            
            if(can2 == false)
            {
                
                can = false;
                break;
            }
        }
        
        if(can) Console.WriteLine("YES");
        else Console.WriteLine("NO");
        
    }
}

Submission Info

Judge Result