[Rust] Casually one-liner easy problem
\n\n# Complexity\n- Time complexity:\nO(n)\n\n- Space complexity:\nO(1)\n\n# Code\nrust\nimpl Solution {\n    pub fn count_seniors(details: Vec<String>) -> i32 
![Screenshot 2024-08-01 at 12.06.51\u202FAM.png](https://assets.leetcode.com/users/images/05e011f2-fd8b-45bc-ada7-22d9c45878f5_1722496124.501299.png)\n\n# Complexity\n- Time complexity:\n$$O(n)$$\n\n- Space complexity:\n$$O(1)$$\n\n# Code\n```rust\nimpl Solution {\n    pub fn count_seniors(details: Vec<String>) -> i32 {\n        details\n            .into_iter()\n            .filter(|detail| detail[11..13].parse::<u8>().unwrap() > 60)\n            .count() as _\n    }\n}\n```
['Rust']