class Solution(object): def firstMissingPositive(self, nums): i = 0 nums = [0] + nums for i in range(len(nums)): while nums[i]>=0 and nums[i]<len(nums) and nums[nums[i]]!=nums[i]: nums[nums[i]],nums[i] = nums[i],nums[nums[i]] num = 1 for i in range(1,len(nums)): if num == nums[i]: num+=1 return num ob = Solution() print(ob.firstMissingPositive([4,-3,1,-1]))

Try our (Version ) Write and Edit, Run, and Share your Code online directly from your browser. This Online Compiler provides you the comfort to edit and compile your code using latest version

How to use our ?

Write and Execute Code

Write your program (or, paste it) directly under the "Source Code" tab.
If you want to save your program, go to the "Project" menu and save it.
You can directly execute your program without saving it and just by clicking on "Execute" button.

How to Enter User Input?

The latest version of our allows to provide program input at run time from the terminal window exactly the same way as you run your program at your own computer. So simply run a program and provide your program input (if any) from the terminal window available in the right side.

Keyboard Shortcuts

The following are the keyword shortcut of our editor:

Shortcut	Description
⌘ + Enter	Run the program
⌘ + G	Share Project
⌘ + Z	Undo Editing
⌘ + Y	Redo Editing
⌘ + A	Select All Text
⌘ + X	Cut Selected Text
⌘ + C	Copy Selected Text
⌘ + V	Paste Copied Text
⌘ + F	Search Text
⌘ + ⌥ + F	Replace Text

Shortcut	Description
Ctrl + Enter	Run the program
Ctrl + G	Share Project
Ctrl + Z	Undo Editing
Ctrl + Y	Redo Editing
Ctrl + A	Select All Text
Ctrl + X	Cut Selected Text
Ctrl + C	Copy Selected Text
Ctrl + V	Paste Copied Text
Ctrl + F	Search Text
Ctrl + H	Replace Text

Share Your Project Online

You can use this feature to share your Code with your teachers, classmates and colleagues. Just click Share Button and it will create a short link, which can be shared through Email, WhatsApp or even through Social Media. A shared link will be deleted if it has been passive for almost 3 months.

More Features of the Editor

Theme – You can change the current editor's theme from the "Editor Theme" option under "Settings" menu.
Font Size – You can change the font size of the editor/compiler from the "Font Size" option under "Settings" menu.
Tab Size – You can change the tab size from the "Tab Size" option under "Settings" Menu.
Show/Hide Line Numbers – You can show/hide the line number with the code from the "Show Line Numbers" or "Hide Line Numbers" option under "Settings" Menu.
And, many more.