Sentence Screen Fitting

Given a rows x cols screen and a sentence represented by a list of 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 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.
分析：

统计加空格的句子总长度，然后遍历每一行，初始化colsRemaining为cols，然后还需要一个变量idx，来记录当前单词的位置，如果colsRemaining大于0，就进行while循环，如果当前单词的长度小于等于colsRemaining，说明可以放下该单词，那么就减去该单词的长度就是剩余的空间，然后如果此时colsRemaining仍然大于0，则减去空格的长度1，然后idx自增1，如果idx此时超过单词个数的范围了，说明一整句可以放下，那么就有可能出现宽度远大于句子长度的情况，所以我们加上之前放好的一句之外，还要加上colsRemaining/len的个数，然后colsRemaining%len是剩余的位置，此时idx重置为0.

 class Solution {
     int wordsTyping(String[] sentence, int rows, int cols) {
         String all = "";
         for (String word : sentence) {
             all += (word + " ");
         }
         int res = , idx = , n = sentence.length, len = all.length();
         for (int i = ; i < rows; ++i) {
             int colsRemaining = cols;
             while (colsRemaining > ) {
                 if (sentence[idx].length() <= colsRemaining) {
                     colsRemaining -= sentence[idx].length();
                     if (colsRemaining > ) {
                         colsRemaining -= ;
                     }
                     if (++idx >= n) {
                         res += ( + colsRemaining / len);
                         colsRemaining %= len;
                         idx = ;
                     }
                 } else {
                     break;
                 }
             }
         }
         return res;
     }
 }