Average Salary Excluding the Minimum and Maximum Salary LeetCode solution in Rust

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impl Solution {
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  pub fn average(salary: Vec<i32>) -> f64 {
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    (salary.iter().fold(0, |acc, s| {
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      if s == salary.iter().min().unwrap() || s == salary.iter().max().unwrap() {
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        acc
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      } else {
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        acc + s
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      }
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    }) as f64)
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      / (salary.len() - 2) as f64
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  }
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}