Can place flowers

Array Greedy

29.1% acceptance

Feb 20, 2026

7350

1317

You have a long flowerbed in which some of the plots are planted, and some are not. However, flowers cannot be planted in adjacent plots. Given an integer array flowerbed containing 0's and 1's, where 0 means empty and 1 means not empty, and an integer n, return true if n new flowers can be planted in the flowerbed without violating the no-adjacent-flowers rule and false otherwise.

Solution

Rust

Time O(n)

Space O(1)

LeetCode

solution.rs

impl Solution {
  pub fn can_place_flowers(mut flowerbed: Vec<i32>, n: i32) -> bool {
    let len = flowerbed.len();
    let mut count = 0;
    for i in 0..len {
      if flowerbed[i] == 0 {
        let left = i == 0 || flowerbed[i - 1] == 0;
        let right = i == len - 1 || flowerbed[i + 1] == 0;
        if left && right {
          flowerbed[i] = 1;
          count += 1;
        }
      }
    }
    count >= n
  }
}