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;
using System.Linq;

namespace AGC034
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] input = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int N = input[0];
            int A = input[1] - 1;
            int B = input[2] - 1;
            int C = input[3] - 1;
            int D = input[4] - 1;
            string s = Console.ReadLine();

            if (C < D || C < B)
            {
                int index = B;
                int goal = D;
                int count = 0;
                while (count < 2)
                {
                    while (index < goal)
                    {
                        if (index + 2 < s.Length && s[index + 2] == '.') { index += 2; }
                        else if (index + 1 < s.Length && s[index + 1] == '.') { index += 1; }
                        else { Console.WriteLine("No"); }
                    }
                    count++;
                    index = A;
                    goal = C;
                }
                Console.WriteLine("Yes");
            }
            else
            {
                for (int i = B; i < D; i++)
                {
                    if (s[i - 1] == '.' && s[i] == '.' && s[i + 1] == '.') { Console.WriteLine("Yes"); return; }
                }
                Console.WriteLine("No");
            }
        }
    }
}