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: Wrong Answer)

using System;

class AGC_034_A
{
    static void Main(string[] args)
    {
        string[] input = Console.ReadLine().Split(' ');
        int N = int.Parse(input[0]);
        int A = int.Parse(input[1]);
        int B = int.Parse(input[2]);
        int C = int.Parse(input[3]);
        int D = int.Parse(input[4]);

        string S = Console.ReadLine();

        int[] SArray = new int[N];
        int counter = 0;
        for (int i = 0; i < N; i++)
        {
            if (S[i] == '#') counter++;
            else counter = 0;

            SArray[i] = counter;
        }

        for (int i = A; i < C; i++)
        {
            if(SArray[i]>1)
            {
                Console.WriteLine("No");
                return;
            }
        }

        for (int i = B; i < D; i++)
        {
            if (SArray[i] > 1)
            {
                Console.WriteLine("No");
                return;
            }
        }

        if(D<C)
        {
            int spaceCount = 0;
            for (int i = B-2; i < D; i++)
            {
                if (SArray[i] == 0) spaceCount++;
                else spaceCount = 0;

                if (spaceCount >= 3) break;
            }
            if (spaceCount<3)
            {
                Console.WriteLine("No");
                return;
            }
        }

        Console.WriteLine("Yes");
    }
}