leetcode 26 Remove Duplicates from Sorted Array
leetcode 26 Remove Duplicates from Sorted Array
流川疯
发布于 2019-01-18 15:25:00
发布于 2019-01-18 15:25:00
Remove Duplicates from Sorted ArrayTotal Accepted: 66627 Total Submissions: 212739 My Submissions
Given a sorted array, remove the duplicates in place such that each element appear onlyonce and return the new length.
Do not allocate extra space for another array, you must do this in place with constant memory.
For example,
Given input array nums = [1,1,2],
Your function should return length = 2, with the first two elements ofnums being 1 and 2 respectively. It doesn't matter what you leave beyond the new length
64ms好像有点慢了，这个方法有点讨巧了，绕过了算法的部分，以后还是少写这样的代码，多练习算法
我的解决方案：
class Solution {
public:
int removeDuplicates(vector<int>& nums)
{
set<int> result;
for(int i = 0;i< nums.size();i++)
{
result.insert(nums[i]);
}
nums.clear();
set<int>::iterator iter = result.begin();
for(;iter!=result.end();iter++)
{
nums.push_back(*iter);
}
return nums.size();
}
};class Solution {
public:
int removeDuplicates(vector<int>& nums) {
int start=1,N = nums.size();
if(N<=1) return N;
for(int i=1;i<nums.size();i++) {
if(nums[i]!=nums[i-1]){
nums[start]=nums[i];
start++;
}
}
return start;
}
};一行代码的STL:
class Solution { public: int removeDuplicates(int A[], int n) { return distance(A, unique(A, A+n)); } };int removeDuplicates(vector<int>& nums) {
if(nums.size() <= 1) return nums.size();
vector<int>::iterator it1,it2;
for(it1=nums.begin(),it2=nums.begin()+1; it2 != nums.end();) {
if(*it2 == *it1) it2=nums.erase(it2);
else {it1++;it2++;}
}
return nums.size();
} python解决方案：
class Solution:
# @param a list of integers
# @return an integer
def removeDuplicates(self, A):
if not A:
return 0
newTail = 0
for i in range(1, len(A)):
if A[i] != A[newTail]:
newTail += 1
A[newTail] = A[i]
return newTail + 1本文参与 腾讯云自媒体分享计划，分享自作者个人站点/博客。
原始发表：2015年06月25日，如有侵权请联系 cloudcommunity@tencent.com 删除
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