Given an unsorted integer array, find the smallest missing positive integer. Example 1: Input: [1,2,0] Output: 3 Example 2: Input: [3,4,-1,1] Output: 2 Example 3: Input: [7,8,9,11,12] Output: 1 Note: Your algorithm should run in O(n) time and uses co…

Given an unsorted integer array, find the smallest missing positive integer. Example 1: Input: [1,2,0]Output: 3Example 2: Input: [3,4,-1,1]Output: 2Example 3: Input: [7,8,9,11,12]Output: 1Note: Your algorithm should run in O(n) time and uses constant…

First Missing Positive  Given an unsorted integer array, find the first missing positive integer. For example, Given [1,2,0] return 3, and [3,4,-1,1] return 2. Your algorithm should run in O(n) time and uses constant space. 思路:这个题刚開始是没有思路的,难就难在O(n)时间…

leetcode - 41. First Missing Positive - Hard descrition Given an unsorted integer array, find the first missing positive integer. For example, Given [1,2,0] return 3, and [3,4,-1,1] return 2. Your algorithm should run in O(n) time and uses constant s…

41. First Missing Positive Problem's Link ---------------------------------------------------------------------------- Mean: 给你一组整数,找出第一个空缺的正整数. 要求:时间O(n),空间O(n). analyse: 这题时间O(n)想了半天没想到,用O(n*logn)过的. 然后看了discuss,想法非常巧妙,自愧不如. Time complexity: O(N) v…

Given an unsorted integer array, find the smallest missing positive integer. Example 1: Input: [1,2,0] Output: 3 Example 2: Input: [3,4,-1,1] Output: 2 Example 3: Input: [7,8,9,11,12] Output: 1 Note: Your algorithm should run in O(n) time and uses co…

Given an unsorted integer array, find the first missing positive integer. For example,Given [1,2,0] return 3,and [3,4,-1,1] return 2. Your algorithm should run in O(n) time and uses constant space. 这道题求的是在一个乱序数组中缺少的第一个正数,要求时间复杂度o(n)空间复杂度为1. 先上代码 pack…

题目描述: Given an unsorted integer array, find the first missing positive integer. For example,Given [1,2,0] return 3,and [3,4,-1,1] return 2. Your algorithm should run in O(n) time and uses constant space. 解题思路: 参考http://blog.csdn.net/nanjunxiao/articl…

题目链接: https://leetcode.com/problems/first-missing-positive/?tab=Description   给出一个未排序的数组,求出第一个丢失的正数. 给出组合为int []nums = {0,1,3,-1,2,5}; 下面为按照参考代码1执行交换运算的输出结果   0 1 3 -1 2 51 0 3 -1 2 51 0 3 -1 2 51 0 3 -1 2 51 0 3 -1 2 51 2 3 -1 0 51 2 3 -1 0 51 2 3 -…

# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com' 41: First Missing Positivehttps://oj.leetcode.com/problems/first-missing-positive/ Given an unsorted integer array, find the first missing positive integer.For example,Given [1,2,0] return…