Number of Flowers in Full Bloom LeetCode solution in Rust

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impl Solution {
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  pub fn full_bloom_flowers(flowers: Vec<Vec<i32>>, people: Vec<i32>) -> Vec<i32> {
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    let get_time_and_sort = |i| {
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      let mut ret = flowers.iter().map(|f| f[i]).collect::<Vec<_>>();
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      ret.sort();
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      ret
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    };
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    let start = get_time_and_sort(0);
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    let end = get_time_and_sort(1);
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    people
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      .into_iter()
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      .map(|time| {
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        (start.partition_point(|&s| s <= time) - end.partition_point(|&e| e < time)) as i32
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      })
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      .collect()
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  }
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}