## 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:
apple
pie-I

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

## Rust Solution

``````struct Solution;

impl Solution {
fn words_typing(sentence: Vec<String>, rows: i32, cols: i32) -> i32 {
let size: Vec<usize> = sentence.into_iter().map(|s| s.len()).collect();
let n = size.len();
let sum: usize = size.iter().sum::<usize>() + n;
let mut i = 0;
let rows = rows as usize;
let cols = cols as usize;
let mut res = 0;
for _ in 0..rows {
if size[i] <= cols {
let m = cols / sum;
res += m;
let mut start = m * sum;
if start + size[i] <= cols {
start += size[i];
i += 1;
if i == n {
i = 0;
res += 1;
}
} else {
continue;
}
while start + size[i] < cols {
start += size[i] + 1;
i += 1;
if i == n {
i = 0;
res += 1;
}
}
} else {
break;
}
}
res as i32
}
}

#[test]
fn test() {
let rows = 2;
let cols = 8;
let sentence = vec_string!["hello", "world"];
let res = 1;
assert_eq!(Solution::words_typing(sentence, rows, cols), res);
let rows = 3;
let cols = 6;
let sentence = vec_string!["a", "bcd", "e"];
let res = 2;
assert_eq!(Solution::words_typing(sentence, rows, cols), res);
let rows = 4;
let cols = 5;
let sentence = vec_string!["I", "had", "apple", "pie"];
let res = 1;
assert_eq!(Solution::words_typing(sentence, rows, cols), res);
}
``````

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