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Added sort jumbled numbers solution.
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@@ -48,3 +48,4 @@ mod remove_duplicates; | |
mod sort_people; | ||
mod max_repeating_substr; | ||
mod freq_sort; | ||
mod sort_jumbled_numbers; |
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@@ -0,0 +1,40 @@ | ||
use std::collections::HashMap; | ||
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pub fn sort_jumbled(mapping: Vec<i32>, mut numbers: Vec<i32>) -> Vec<i32> { | ||
let mut m = HashMap::with_capacity(numbers.len()); | ||
for (index, number) in numbers.iter().enumerate() { | ||
let mapped = map_number(*number, &mapping); | ||
m.insert(*number, (mapped, index)); | ||
} | ||
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numbers.sort_by_key(|number| m.get(number)); | ||
numbers | ||
} | ||
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fn map_number(mut number: i32, mapping: &[i32]) -> i32 { | ||
if number == 0 { | ||
return mapping[0]; | ||
} | ||
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let mut mapped = 0; | ||
let mut place = 0; | ||
while number > 0 { | ||
mapped += mapping[number as usize % 10] * 10_i32.pow(place); | ||
number /= 10; | ||
place += 1; | ||
} | ||
mapped | ||
} | ||
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#[cfg(test)] | ||
mod tests { | ||
use super::sort_jumbled; | ||
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#[test] | ||
fn jumped_numbers_are_sorted() { | ||
let mapping = vec![9, 8, 7, 6, 5, 4, 3, 2, 1, 0]; | ||
let numbers = vec![0, 1, 2, 3, 4, 5, 6, 7, 8, 9]; | ||
let actual = sort_jumbled(mapping, numbers); | ||
assert_eq!(vec![9, 8, 7, 6, 5, 4, 3, 2, 1, 0], actual) | ||
} | ||
} |