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struct Solution;
impl Solution {
pub fn can_visit_all_rooms(rooms: Vec<Vec<i32>>) -> bool {
let mut unlocked = vec![false; rooms.len()];
unlocked[0] = true;
let mut stack = vec![0];
while let Some(next) = stack.pop() {
for &i in &rooms[next as usize] {
if !unlocked[i as usize] {
unlocked[i as usize] = true;
stack.push(i);
}
}
}
unlocked.iter().all(|&b| b)
}
}
fn main() {
let rooms = vec![vec![1], vec![2], vec![3], vec![]];
print!("{}", Solution::can_visit_all_rooms(rooms));
}
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