59 lines
1.1 KiB
Rust
59 lines
1.1 KiB
Rust
/**
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* [1845] Seat Reservation Manager
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*/
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pub struct Solution {}
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// submission codes start here
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use std::cmp::Reverse;
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use std::collections::BinaryHeap;
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struct SeatManager {
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seats: BinaryHeap<Reverse<i32>>,
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}
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/**
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* `&self` means the method takes an immutable reference.
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* If you need a mutable reference, change it to `&mut self` instead.
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*/
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impl SeatManager {
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fn new(n: i32) -> Self {
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let mut heap = BinaryHeap::with_capacity(n as usize);
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for i in 1..=n {
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heap.push(Reverse(i));
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}
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Self { seats: heap }
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}
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fn reserve(&mut self) -> i32 {
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let head = self.seats.pop();
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head.unwrap().0
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}
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fn unreserve(&mut self, seat_number: i32) {
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self.seats.push(Reverse(seat_number));
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}
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}
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/**
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* Your SeatManager object will be instantiated and called as such:
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* let obj = SeatManager::new(n);
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* let ret_1: i32 = obj.reserve();
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* obj.unreserve(seatNumber);
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*/
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// submission codes end
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_1845() {
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let mut manager = SeatManager::new(5);
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assert_eq!(1, manager.reserve());
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}
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}
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