Problem:
Score : 400 points

Problem Statement

There are N squares arranged in a row, numbered 1, 2, ..., N from left to right.
You are given a string S of length N consisting of . and #. If the i-th character of S is #, Square i contains a rock; if the i-th character of S is ., Square i is empty.

In the beginning, Snuke stands on Square A, and Fnuke stands on Square B.

You can repeat the following operation any number of times:

Choose Snuke or Fnuke, and make him jump one or two squares to the right. The destination must be one of the squares, and it must not contain a rock or the other person.

You want to repeat this operation so that Snuke will stand on Square C and Fnuke will stand on Square D.

Determine whether this is possible.

Constraints

4 \leq N \leq 200\ 000

S is a string of length N consisting of . and #.

1 \leq A, B, C, D \leq N

Square A, B, C and D do not contain a rock.

A, B, C and D are all different.

A < B

A < C

B < D

Input

Input is given from Standard Input in the following format:

N A B C D
S

Output

Print Yes if the objective is achievable, and No if it is not.

Sample Input 1

7 1 3 6 7
.#..#..

Sample Output 1

Yes

The objective is achievable by, for example, moving the two persons as follows. (A and B represent Snuke and Fnuke, respectively.)

A#B.#..

A#.B#..

.#AB#..

.#A.#B.

.#.A#B.

.#.A#.B

.#..#AB

Sample Input 2

7 1 3 7 6
.#..#..

Sample Output 2

No

Sample Input 3

15 1 3 15 13
...#.#...#.#...

Sample Output 3

Yes

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
 
namespace ConsoleApp3
{
    class Program
    {
        static void Main(string[] args)
        {
            String[] Inp=Console.ReadLine().Split(' ');
            int N = int.Parse(Inp[0]);
            int A = int.Parse(Inp[1]);
            int B = int.Parse(Inp[2]);
            int C = int.Parse(Inp[3]);
            int D = int.Parse(Inp[4]);
 
 
            if (A > B)
            {
                int ABCD = A;
                A = B;
                B = ABCD;
                ABCD = C;
                C = D;
                D = ABCD;
            }
 
            String S = Console.ReadLine();
            bool Ans = true;
 
            String betS;
            if (C < B)
            {
                betS = S.Substring(A - 1, C - A);
                if(betS.Contains("##"))
                {
                    Ans = false;
                }
                betS = S.Substring(B - 1, D - B);
                if (betS.Contains("##"))
                {
                    Ans = false;
                }
            }
            else if (C < D)
            {
                betS = S.Substring(A - 1, D - A);
                if (betS.Contains("##"))
                {
                    Ans = false;
                }
 
            }
            else if (C > D)
            {
                betS = S.Substring(A - 1, C - A);
                if (betS.Contains("##"))
                {
                    Ans = false;
                }
                betS = S.Substring(B - 2, D - B +3);
                if (betS.Contains("...") == false)
                {
                        Ans = false;
                    
                }
            }
 
            if(Ans == true)
            {
                Console.WriteLine("Yes");
            }
            else
            {
                Console.WriteLine("No");
            }
 
 
 
 
            
 
        }
    }
}