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 Python3 (judge verdict: Accepted)

if __name__ == '__main__':
    import sys
    input = sys.stdin.readline

    from collections import deque

    s = input()
    s1 = deque([])
    s2 = deque([])
    sum_ = 0    # sumを変数名にすると、関数のsum()を使えなくなるので注意
    for i, ch in enumerate(s):
        if ch == '\\':   # \はエスケープ文字として機能してしまうので２連続で書く必要がある
            s1.append(i)
        elif ch == '/' and len(s1) > 0:
            j = s1.pop()
            sum_ += i - j
            a = i - j
            while len(s2) > 0 and s2[-1][0] > j:
                a += s2.pop()[1]
            s2.append([j,a])

    ans = []
    while len(s2) > 0:
        ans.append(s2.pop()[1])    # s2から水たまりの面積だけを取り出してansに入れる
    ans.reverse()                  # 順番反転
    print(sum(ans))
    ans.insert(0,len(ans))   # 先頭に水たまりの個数を挿入
    print(' '.join(map(str, ans)))