剑指 Offer 42:连续子数组的最大和

This commit is contained in:
huangge1199@hotmail.com 2021-07-17 22:39:01 +08:00
parent 53a8669da9
commit 0347cbcb08
4 changed files with 84 additions and 5 deletions

View File

@ -0,0 +1,57 @@
//输入一个整型数组数组中的一个或连续多个整数组成一个子数组求所有子数组的和的最大值
//
// 要求时间复杂度为O(n)
//
//
//
// 示例1:
//
// 输入: nums = [-2,1,-3,4,-1,2,1,-5,4]
//输出: 6
//解释: 连续子数组 [4,-1,2,1] 的和最大 6
//
//
//
// 提示
//
//
// 1 <= arr.length <= 10^5
// -100 <= arr[i] <= 100
//
//
// 注意本题与主站 53 题相同https://leetcode-cn.com/problems/maximum-subarray/
//
//
// Related Topics 数组 分治 动态规划
// 👍 339 👎 0
package leetcode.editor.cn;
import java.util.Stack;
//剑指 Offer 42:连续子数组的最大和
class LianXuZiShuZuDeZuiDaHeLcof {
public static void main(String[] args) {
//测试代码
Solution solution = new LianXuZiShuZuDeZuiDaHeLcof().new Solution();
System.out.println(solution.maxSubArray(new int[]{-1}));
System.out.println(solution.maxSubArray(new int[]{-2, 1, -3, 4, -1, 2, 1, -5, 4}));
System.out.println(solution.maxSubArray(new int[]{-2, -1}));
}
//力扣代码
//leetcode submit region begin(Prohibit modification and deletion)
class Solution {
public int maxSubArray(int[] nums) {
int cur = 0;
int max = Integer.MIN_VALUE;
for (int num : nums) {
cur = Math.max(cur + num, num);
max = Math.max(max, cur);
}
return max;
}
}
//leetcode submit region end(Prohibit modification and deletion)
}

View File

@ -0,0 +1,25 @@
<p>输入一个整型数组,数组中的一个或连续多个整数组成一个子数组。求所有子数组的和的最大值。</p>
<p>要求时间复杂度为O(n)。</p>
<p>&nbsp;</p>
<p><strong>示例1:</strong></p>
<pre><strong>输入:</strong> nums = [-2,1,-3,4,-1,2,1,-5,4]
<strong>输出:</strong> 6
<strong>解释:</strong>&nbsp;连续子数组&nbsp;[4,-1,2,1] 的和最大,为&nbsp;6。</pre>
<p>&nbsp;</p>
<p><strong>提示:</strong></p>
<ul>
<li><code>1 &lt;=&nbsp;arr.length &lt;= 10^5</code></li>
<li><code>-100 &lt;= arr[i] &lt;= 100</code></li>
</ul>
<p>注意:本题与主站 53 题相同:<a href="https://leetcode-cn.com/problems/maximum-subarray/">https://leetcode-cn.com/problems/maximum-subarray/</a></p>
<p>&nbsp;</p>
<div><div>Related Topics</div><div><li>数组</li><li>分治</li><li>动态规划</li></div></div>\n<div><li>👍 339</li><li>👎 0</li></div>

File diff suppressed because one or more lines are too long

File diff suppressed because one or more lines are too long