leetcode/Problemset/1263-Minimum Moves to Move a Box to Their Target Location/Solution.rs at master · fruit-in/leetcode · GitHub

Name: leetcode/Problemset/1263-Minimum Moves to Move a Box to Their Target Location/Solution.rs at master · fruit-in/leetcode · GitHub
Rating: 4.7 (120 reviews)
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use std::collections::HashSet;
use std::collections::VecDeque;

implSolution{
pubfnmin_push_box(grid:Vec<Vec<char>>) -> i32{
let(m, n) = (grid.len(), grid[0].len());
letmut visited_player = HashSet::new();
letmut stack_player = vec![];
letmut visited_box = HashSet::new();
letmut deque_box = VecDeque::new();

for i in0..m {
for j in0..n {
if grid[i][j] == 'S'{
 visited_player.insert((i, j));
 stack_player.push((i, j));
break;
}
}
}

whileletSome((i, j)) = stack_player.pop(){
if i > 0 && grid[i - 1][j] == 'B' && !visited_box.contains(&(i - 1, j,'U')){
 visited_box.insert((i - 1, j,'U'));
 deque_box.push_back((i - 1, j,'U',0));
}
if i < m - 1 && grid[i + 1][j] == 'B' && !visited_box.contains(&(i + 1, j,'D')){
 visited_box.insert((i + 1, j,'D'));
 deque_box.push_back((i + 1, j,'D',0));
}
if j > 0 && grid[i][j - 1] == 'B' && !visited_box.contains(&(i, j - 1,'L')){
 visited_box.insert((i, j - 1,'L'));
 deque_box.push_back((i, j - 1,'L',0));
}
if j < n - 1 && grid[i][j + 1] == 'B' && !visited_box.contains(&(i, j + 1,'R')){
 visited_box.insert((i, j + 1,'R'));
 deque_box.push_back((i, j + 1,'R',0));
}

if i > 0
 && grid[i - 1][j] != '#'
 && grid[i - 1][j] != 'B'
 && !visited_player.contains(&(i - 1, j))
{
 visited_player.insert((i - 1, j));
 stack_player.push((i - 1, j));
}
if i < m - 1
 && grid[i + 1][j] != '#'
 && grid[i + 1][j] != 'B'
 && !visited_player.contains(&(i + 1, j))
{
 visited_player.insert((i + 1, j));
 stack_player.push((i + 1, j));
}
if j > 0
 && grid[i][j - 1] != '#'
 && grid[i][j - 1] != 'B'
 && !visited_player.contains(&(i, j - 1))
{
 visited_player.insert((i, j - 1));
 stack_player.push((i, j - 1));
}
if j < n - 1
 && grid[i][j + 1] != '#'
 && grid[i][j + 1] != 'B'
 && !visited_player.contains(&(i, j + 1))
{
 visited_player.insert((i, j + 1));
 stack_player.push((i, j + 1));
}
}

whileletSome((i, j, s, pushes)) = deque_box.pop_front(){
if grid[i][j] == 'T'{
return pushes;
}

letmut bi = i;
letmut bj = j;

if s == 'U' && i > 0 && grid[i - 1][j] != '#'{
 bi -= 1;
}elseif s == 'D' && i < m - 1 && grid[i + 1][j] != '#'{
 bi += 1;
}elseif s == 'L' && j > 0 && grid[i][j - 1] != '#'{
 bj -= 1;
}elseif s == 'R' && j < n - 1 && grid[i][j + 1] != '#'{
 bj += 1;
}else{
continue;
}

 visited_player = HashSet::from([(i, j)]);
 stack_player = vec![(i, j)];

whileletSome((i, j)) = stack_player.pop(){
if i > 0 && i - 1 == bi && j == bj && !visited_box.contains(&(bi, bj,'U')){
 visited_box.insert((bi, bj,'U'));
 deque_box.push_back((bi, bj,'U', pushes + 1));
}
if i < m - 1 && i + 1 == bi && j == bj && !visited_box.contains(&(bi, bj,'D')){
 visited_box.insert((bi, bj,'D'));
 deque_box.push_back((bi, bj,'D', pushes + 1));
}
if j > 0 && i == bi && j - 1 == bj && !visited_box.contains(&(bi, bj,'L')){
 visited_box.insert((bi, bj,'L'));
 deque_box.push_back((bi, bj,'L', pushes + 1));
}
if j < n - 1 && i == bi && j + 1 == bj && !visited_box.contains(&(bi, bj,'R')){
 visited_box.insert((bi, bj,'R'));
 deque_box.push_back((bi, bj,'R', pushes + 1));
}

if i > 0
 && grid[i - 1][j] != '#'
 && (i - 1 != bi || j != bj)
 && !visited_player.contains(&(i - 1, j))
{
 visited_player.insert((i - 1, j));
 stack_player.push((i - 1, j));
}
if i < m - 1
 && grid[i + 1][j] != '#'
 && (i + 1 != bi || j != bj)
 && !visited_player.contains(&(i + 1, j))
{
 visited_player.insert((i + 1, j));
 stack_player.push((i + 1, j));
}
if j > 0
 && grid[i][j - 1] != '#'
 && (i != bi || j - 1 != bj)
 && !visited_player.contains(&(i, j - 1))
{
 visited_player.insert((i, j - 1));
 stack_player.push((i, j - 1));
}
if j < n - 1
 && grid[i][j + 1] != '#'
 && (i != bi || j + 1 != bj)
 && !visited_player.contains(&(i, j + 1))
{
 visited_player.insert((i, j + 1));
 stack_player.push((i, j + 1));
}
}
}

 -1
}
}