Problem:
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Areas on the Cross-Section Diagram

Your task is to simulate a flood damage.

For a given cross-section diagram, reports areas of flooded sections.

Assume that rain is falling endlessly in the region and the water overflowing from the region is falling in the sea at the both sides.
For example, for the above cross-section diagram, the rain will create floods which have areas of 4, 2, 1, 19 and 9 respectively.

Input

A string, which represents slopes and flatlands by '/', '\' and '_' respectively, is given in a line. For example, the region of the above example is given by a string "\\///\_/\/\\\\/_/\\///__\\\_\\/_\/_/\".

output

Report the areas of floods in the following format:

$A$

$k$ $L_1$ $L_2$ ... $L_k$

In the first line, print the total area $A$ of created floods.

In the second line, print the number of floods $k$ and areas $L_i (i = 1, 2, ..., k)$ for each flood from the left side of the cross-section diagram. Print a space character before $L_i$.

Constraints

$1 \leq$ length of the string $\leq 20,000$

Sample Input 1

\\//

Sample Output 1

4
1 4

Sample Input 2

\\///\_/\/\\\\/_/\\///__\\\_\\/_\/_/\

Sample Output 2

35
5 4 2 1 19 9

Solution in JAVA (judge verdict: Accepted)

import java.io.UnsupportedEncodingException;
import java.util.ArrayDeque;
import java.util.Deque;
import java.util.Scanner;


class Main {
	public static void main(String args[]) {
		Scanner scanner = new Scanner(System.in);
		String mark = scanner.next();
		int num = mark.length();
		
		SectionDiagram(mark, num, scanner);
		
	}
	//enum宣言
	public static enum Operate{
		back(92),
		slush(47),
		under(95);
		
		private final int mark;
		
		private Operate(final int mark) {
			this.mark = mark;
		}
		
		public int getInt(){
			return this.mark;
		}
	}
	public static Operate getOperate(final int id) {
		Operate[] marks = Operate.values();
		for (Operate type : marks) {
			if (type.getInt() == id) {
				return type;
			}
		}
		return null;
	}
	//治水シミュレーション
	public static void SectionDiagram(String mark, int num, Scanner scanner){
		int count = 0;										//Whileの周回
		byte[] mark_num = new byte[num];					//switch用格納庫
		int sum_puddle = 0;
		
		Deque<Integer> downPos = new ArrayDeque<>();
		Deque<flood> downPosPool = new ArrayDeque<>();
		 
		//文字列変換
		try {
			mark_num = mark.getBytes("US-ASCII");
		} catch (UnsupportedEncodingException e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
		
		while( num > count ){										//文字数文処理
			switch( getOperate(mark_num[count]) ){					//文字により分岐
			case back:
				downPos.push(count);								//追加
				break;
			case slush:
				//頂上じゃなければ
				if ( !downPos.isEmpty()) {
					int slu = downPos.pop();							//スラッシュ追加
					int puddles = count - slu;
					sum_puddle += puddles;
					while (!downPosPool.isEmpty() && downPosPool.peek().rimit > slu) {
						puddles += downPosPool.pop().trout;
					}
					downPosPool.push(new flood(slu, puddles));
				}
				break;
			case under:
				break;
			}
			count ++;
		}
		//出力処理
        System.out.println(sum_puddle);
		int size = downPosPool.size();
        System.out.print(size);
        for (int i = 0; i < size; i++) {
            System.out.print(" ");
            System.out.print(downPosPool.pollLast().trout);
        }
        System.out.println();
	}
	
	static class flood {
        int rimit;
        int trout;
        flood(int i1, int i2) {
            rimit = i1;
            trout = i2;
        }
    }
}