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;

namespace A___Kenken_Race
{
    class Program
    {
        static void Main(string[] args)
        {
            var read = Array.ConvertAll(Console.ReadLine().Split(' '),int.Parse);
            var N = read[0];
            var A = read[1];
            var B = read[2];
            var C = read[3];
            var D = read[4];
            var S = Console.ReadLine();

            var subS = S.Substring(A-1,Math.Max(C,D)-A+1);
            Console.WriteLine(solver(A-1,B-A,C-A,D-A,subS) ? "Yes":"No");            
        }
        static bool solver(int A,int B,int C,int D,string S)
        {
            if(S.IndexOf("##") > 0) return false;
            if(C<D) return true;
            if(S.Substring(B,D-B+1).IndexOf("...")>0) return true;
            if(S.Substring(D-1,3) == "...") return true;
            if(S.Substring(B-1,3) == "...") return true;
            return false;
        }
    }
}