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24 lines
946 B
Markdown
24 lines
946 B
Markdown
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# [605. Can Place Flowers](https://leetcode.com/problems/can-place-flowers/description/)
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# 思路
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题意就是将数组中的某些0变为1且满足每个1没有相邻的1,问是否能改变n个之前为0的元素为1. 题目保证原数组每个1都没有相邻的1.
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使用贪心策略即可,从前往后遍历数组,遇到能变为1的0就将其变为1,同时用count计数,当count达到n即可返回true。
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注意数组首尾的特殊情况。
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# C++
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```
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class Solution {
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public:
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bool canPlaceFlowers(vector<int>& flowerbed, int n) {
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if(n == 0) return true;
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int count = 0;
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for(int i = 0; i < flowerbed.size(); i++){
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if(flowerbed[i]) continue;
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if((i == 0 || flowerbed[i - 1] == 0) && (i == flowerbed.size() - 1 || flowerbed[i + 1] == 0)){
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flowerbed[i] = 1;
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if(++count == n) return true;
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}
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}
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return false;
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}
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};
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```
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