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.Collections.Generic;
using System.Linq;
using System;
using static System.Console;

class Program
{
  static void Main() => new Program().solve();

  void solve()
  {
    var param = ReadLine().Split(' ').Select(int.Parse).ToArray();
    var n = param[0];
    var a = param[1];
    var b = param[2];
    var c = param[3];
    var d = param[4];
    var s = ReadLine();

    var isPossible = false;
    if(b < c && c < d)
    {
      if(!s.Substring(a - 1,d - a).Contains("##"))
      {
        isPossible = true;
      }
    }
    else if(b > c)
    {
      if(!s.Substring(a-1,c - a).Contains("##")
        && !s.Substring(b-1, d - b).Contains("##"))
      {
        isPossible = true;
      }
    }
    else
    {
      if(s.Substring(b-1, d-b).Contains("...")
        && !s.Substring(a-1, c-a).Contains("##"))
      {
        isPossible = true;
      }
    }

    var ans = isPossible ? "Yes" : "No";
    WriteLine(ans);
  }
}