## 937. Reorder Data in Log Files

You are given an array of `logs`. Each log is a space-delimited string of words, where the first word is the identifier.

There are two types of logs:

• Letter-logs: All words (except the identifier) consist of lowercase English letters.
• Digit-logs: All words (except the identifier) consist of digits.

Reorder these logs so that:

1. The letter-logs come before all digit-logs.
2. The letter-logs are sorted lexicographically by their contents. If their contents are the same, then sort them lexicographically by their identifiers.
3. The digit-logs maintain their relative ordering.

Return the final order of the logs.

Example 1:

```Input: logs = ["dig1 8 1 5 1","let1 art can","dig2 3 6","let2 own kit dig","let3 art zero"]
Output: ["let1 art can","let3 art zero","let2 own kit dig","dig1 8 1 5 1","dig2 3 6"]
Explanation:
The letter-log contents are all different, so their ordering is "art can", "art zero", "own kit dig".
The digit-logs have a relative order of "dig1 8 1 5 1", "dig2 3 6".
```

Example 2:

```Input: logs = ["a1 9 2 3 1","g1 act car","zo4 4 7","ab1 off key dog","a8 act zoo"]
Output: ["g1 act car","a8 act zoo","ab1 off key dog","a1 9 2 3 1","zo4 4 7"]
```

Constraints:

• `1 <= logs.length <= 100`
• `3 <= logs[i].length <= 100`
• All the tokens of `logs[i]` are separated by a single space.
• `logs[i]` is guaranteed to have an identifier and at least one word after the identifier.

## Rust Solution

``````struct Solution;

use std::cmp::Ordering::*;

impl Solution {
fn reorder_log_files(mut logs: Vec<String>) -> Vec<String> {
logs.sort_by(|a, b| {
let i = a.find(' ').unwrap();
let j = b.find(' ').unwrap();
let ar = &a[i + 1..];
let br = &b[j + 1..];
let ac = a.chars().last().unwrap();
let bc = b.chars().last().unwrap();
match (char::is_digit(ac, 10), char::is_digit(bc, 10)) {
(true, true) => Equal,
(true, false) => Greater,
(false, true) => Less,
(false, false) => {
let ordering = ar.cmp(br);
if ordering == Equal {
a.cmp(b)
} else {
ordering
}
}
}
});
logs
}
}

#[test]
fn test() {
let input: Vec<String> = vec_string![
"a1 9 2 3 1",
"g1 act car",
"zo4 4 7",
"ab1 off key dog",
"a8 act zoo"
];
let output: Vec<String> = vec_string![
"g1 act car",
"a8 act zoo",
"ab1 off key dog",
"a1 9 2 3 1",
"zo4 4 7"
];
assert_eq!(Solution::reorder_log_files(input), output);
}
``````

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