418. Sentence Screen Fitting

Given a rows x cols screen and a sentence represented by a list of non-empty words, find how many times the given sentence can be fitted on the screen.

Note:

1. A word cannot be split into two lines.
2. The order of words in the sentence must remain unchanged.
3. Two consecutive words in a line must be separated by a single space.
4. Total words in the sentence won't exceed 100.
5. Length of each word is greater than 0 and won't exceed 10.
6. 1 ≤ rows, cols ≤ 20,000.

Example 1:

Input:

rows = 2, cols = 8, sentence = ["hello", "world"]
Output:

 
1
Explanation:

hello---
world---
The character '-' signifies an empty space on the screen.

Example 2:

Input:

rows = 3, cols = 6, sentence = ["a", "bcd", "e"]
Output:

 
2
Explanation:

a-bcd- 
e-a---
bcd-e-
The character '-' signifies an empty space on the screen.

Example 3:

Input:

rows = 4, cols = 5, sentence = ["I", "had", "apple", "pie"]
Output:

 
1
Explanation:

I-had
apple
pie-I
had--
The character '-' signifies an empty space on the screen.