LeeCo cancel OK Search Sort Send View This Problem In Web Reload Loading… Feedback Write feedback here Your feedback has been sent! Thank you! Failed to send your feedback. Better Solution Better Solution For  Send Your Better Solution You can send your better solution and the problem title to me. After checking your wonderful solution, I will update the solution. Thanks for making LeeCo better! My e-mail address is\nNightonke@outlook.com Copy e-mail address E-mail address copied. Write the e-mail Sort By Sort by Click to login Favorites  Likes  Tags Settings Help Feedback About LeeCo Sign Out Sure to sign out? sign out cancel LeeCo Welcome to LeeCo! After signing in, you can COLLECT your favorite problems WRITE comments VOTE for comments GET VOTES from comments Let\'s join LeeCo right now! sign in sign up cancel Sign In User name Password sign in Forget password cancel Empty user name Empty password Internet disconnected User not found Password wrong Incorrect user name or password Signing in… Sign in successfully Forget Password Sorry to hear that you forget your password. You can send me an e-mail to get your password back. My e-mail address is\nNightonke@outlook.com write the e-mail copy e-mail address cancel Get Your Password Back E-mail address copied. 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Cancel Loading failed, internet disconnected LeeCo LeeCo helps you practice algorithms and data structures. LeeCo is a personal application for LeetCode(leetcode.com/problemset/algorithms/). With LeeCo, you can read all the problems(including the locked problems), collect your favorite problems and see how many people collected them as well. There is a sample solution for each problem for everyone to comment on. The discusses on the LeetCode are list in LeeCo too, with these you can think more about algorithms and data structures. And also, you can write comments for problems just like everyone does. If you like some comments, you can vote for them or reply them. You can get many votes for your own(that\'s a record for everyone) if your comments are so great. For more information about LeeCo, you can check the help in the drawer menu in the left of the main page. Now, join algorithms and data structures with LeeCo! Developer Nightonke Follow Me! LeeCo Is Open Source github.com/Nightonke/LeetCoder2 Blog blog.csdn.net/u012925008 Email Nightonke@outlook.com Write Me A Letter Libs Thanks for the awesome libs follow Images Loading com.squareup.picasso Smart Tab com.ogaclejapan.smarttablayout Finest WebView com.thefinestartist Bmob cn.bmob.android Tag Group me.gujun.android.taggroup Super RecyclerView com.malinskiy:superrecyclerview Auto Fit TextView me.grantland:autofittextview Animation com.daimajia.androidanimations Material Dialog com.github.afollestad.material-dialogs Cult com.github.ppamorim Text Drawable com.amulyakhare:com.amulyakhare.textdrawable Super Toast com.github.johnpersano:supertoasts Expandable Layout com.github.aakira:expandable-layout Bugly com.tencent.bugly  Vote  Votes  Like  Likes  Tag  Tags Main Page In the main page of LeeCo, there are algorithm problems from LeetCode(leetcode.com/problemset/algorithms/). All the algorithm problems are classified into 29 tags in the sub pages. You can see the degree of difficulty and the being collected times of every problem. Click a problem then you can check the details of the content, solution, discusses(from LeetCode) and comments(from LeeCo) of the problem. Open the drawer menu, there are the information of user(after signing in), all the tags(click to jump to the corresponding sub page), settings, help, feedback and about. There are sorting and searching icons at the top right-hand corner to help you search and read problems. Sign Up and Sign In You can sign up and sign in to LeeCo. After signing in, you can collect problems, publish, reply and vote comments. Favorite After signing in, you can click the favorite button in the drawer menu in the main page to check all the problems collected by you. There are 2 ways to collect or cancel the collection of problems: long press the problem in the main page or in the favorite page, click the "heart" button in the problem page introduced below. And also, you can sort or search problems in the favorite just as in main page. Problem After clicking a problem to jump to the problem page, you can find all the details of the problem, including title, tags, difficulty level, times of being collected, problem content and similar problems. Try to click the "airplane" button at the top right-hand corner to check the problem in LeetCode or click the "heart" to collect this problem or cancel it. If you want to check the tags of the problem, just click the tag and click the check icon(the eye in toast) to jump to the sub page of the tag. Similarly, click the similar problems to jump to the corresponding problems. Solution Swipe to left to enter the solution page at the right of problem page, where there is the solution provided by LeeCo for the problem. Click the copy button to copy the codes of the solution. If you find some mistakes of problem and solution or just think the solution is just so so, you can click the "hand" button to feedback. Discuss In the discuss page at the right of solution page, there are discusser from LeetCode. You can sort the discusses or click them to view in web. Comment In the comment page, you can comment on problems and solutions. Click a comment then you can expand or collapse it. Long press a comment then you can reply to, vote or veto for and copy the content of the comment if the comment is not published by you. Long press a comment published by you, you can edit, delete it or just copy the content of the comment. Click the buttons at the bottom right-hand corner of a comment to reply, vote or veto quickly. You can sort the comments or publish your comments through the buttons at the top right-hand corner. The times of vote to your comments will be add up to your account. You can check this in the drawer in the main page. Other In the drawer of main page, you can also: set your password or check the update in settings, check this document in help, feedback to help LeeCo be better and check the information of the developer and the open-source address of LeeCo.