20240322 Finished
This commit is contained in:
parent
547630c8ce
commit
fd3ad71cc0
|
@ -81,3 +81,4 @@ mod p303_range_sum_query_immutable;
|
|||
mod p1793_maximum_score_of_a_good_subarray;
|
||||
mod p1969_minimum_non_zero_product_of_the_array_elements;
|
||||
mod p2671_frequency_tracker;
|
||||
mod p2617_minimum_number_of_visited_cells_in_a_grid;
|
|
@ -0,0 +1,71 @@
|
|||
/**
|
||||
* [2617] Minimum Number of Visited Cells in a Grid
|
||||
*/
|
||||
pub struct Solution {}
|
||||
|
||||
|
||||
// submission codes start here
|
||||
use std::{cmp::Reverse, collections::BinaryHeap};
|
||||
|
||||
impl Solution {
|
||||
pub fn minimum_visited_cells(grid: Vec<Vec<i32>>) -> i32 {
|
||||
let height = grid.len();
|
||||
let width = grid[0].len();
|
||||
|
||||
let mut column_heaps: Vec<BinaryHeap<(Reverse<i32>, usize)>> = vec![BinaryHeap::new(); width];
|
||||
let mut row_heap: BinaryHeap<(Reverse<i32>, usize)> = BinaryHeap::new();
|
||||
|
||||
let mut dis = 0;
|
||||
for (i, row) in grid.iter().enumerate() {
|
||||
row_heap.clear();
|
||||
|
||||
for (j, &node) in row.iter().enumerate() {
|
||||
while !row_heap.is_empty() && row_heap.peek().unwrap().1 < j {
|
||||
row_heap.pop();
|
||||
}
|
||||
|
||||
let column_heap = &mut column_heaps[j];
|
||||
while !column_heap.is_empty() && column_heap.peek().unwrap().1 < i {
|
||||
column_heap.pop();
|
||||
}
|
||||
|
||||
dis = if i > 0 || j > 0 {
|
||||
i32::MAX
|
||||
} else {
|
||||
1
|
||||
};
|
||||
|
||||
if let Some((d, _)) = row_heap.peek() {
|
||||
dis = d.0 + 1;
|
||||
}
|
||||
|
||||
if let Some((d, _)) = column_heap.peek() {
|
||||
dis = dis.min(d.0 + 1);
|
||||
}
|
||||
|
||||
if node > 0 && dis < i32::MAX {
|
||||
let node = node as usize;
|
||||
row_heap.push((Reverse(dis), node + j));
|
||||
column_heap.push((Reverse(dis), node + i));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if dis < i32::MAX {
|
||||
dis
|
||||
} else {
|
||||
-1
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// submission codes end
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_2617() {
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue
Block a user