By satylogin, history, 12 months ago, ,

I realised that there is only one way improve one's skill, and that is through practice. So I decided to practice more topics and more problems on codeforces and different judges. This is simply a daily record for what I did through my vacation.

I also want to tell you about stopstalk.com . It is a good site to make and keep you daily coding record.

## 16 MAY 2017

##### Problems Solved -
###### 1. http://codeforces.com/problemset/problem/535/D
This was a simple problem and it used Z function for prefix length calculation
###### 2. http://codeforces.com/problemset/problem/551/B
Although the problem was simple, I had some trouble in understanding the language of the problem. It took time more than required.

##### Participated Contest -

I participated in a virtual contest ( Round 308 DIV 2 ). I was able to solve all the problems, but then last problem was accepted just 2 min before the contest ended.

###### A. http://codeforces.com/problemset/problem/552/A
The problem was fairly simple, but then rather than simply adding the area, I made a 2-D hash map. Guess I have to practice a little more for problem A.
###### B. http://codeforces.com/problemset/problem/552/B
The problem was mathematical. I solved it by forming a series. Got one WA for not using long long.
###### C. http://codeforces.com/problemset/problem/552/C
I solved the problem using meet in middle. But the editorial talked about an another wonderful way to solve that. Do watch the editorial solution. It is an excellent concept in itself.
###### D. http://codeforces.com/problemset/problem/552/D
This was another interesting problem to solve. I used concept of slopes to generate triangle. Got 4 WA. Was not taking care of slope sign and was not handling 0 slope and inf slope cases.
###### E. http://codeforces.com/problemset/problem/552/E
Pretty interesting problem to solve both by greedy and by DP. I used the later N*N approach. Initially thought of using multiplication as boundaries, but then didn't wanted to take risk. Got 4 WA because of simple mistakes in the loops. Got accepted just before 2 min from end.

## 17 MAY 2017

Solved very few problems. Found a lot of problems hard to solve.

##### Problems Solved -
###### 1. http://codeforces.com/problemset/problem/551/C
It was a good problem of binary search. Although I found it a little hard for problem C Div 2. Guess I have practice still more. It used an standard NlogN solution using binary search where we have to binary search over the completion time of the task and then check the users required. Good problem for practice.
###### 2. http://codeforces.com/problemset/problem/549/A
Fairly easy problem. Requires direct implementation
###### 3. http://codeforces.com/problemset/problem/534/E
very good problem for practice. I was missing a lot of corner cases while solving. Had to search for a method to find mismatch in logN time in the array. I think this problem was worth solving.

## 18 MAY 2017

##### Problems Solved -

I solved some simple problems on hackerearth and URI. One problem that I liked was from URI —

###### 1. https://www.urionlinejudge.com.br/judge/en/problems/view/1469
This was a good problem where we had to swap nodes. I used map for mapping and index function and an inverse index function for getting position of a node and getting value at any position. for swapping, I swapped those two.

Then some problems on codeforces

###### 1. http://codeforces.com/problemset/problem/549/H
Finally solved the matrix problem. Used binary search for reducing the size of squares.
###### 2. http://codeforces.com/problemset/problem/519/A
Direct implementation
###### 3. http://codeforces.com/problemset/problem/519/B
Direct implementation
###### 4. http://codeforces.com/problemset/problem/519/C
Turned out to be easy for problem C. Just travel over one possible value, then find the value of other and then maximise the sum.
###### 5. http://codeforces.com/problemset/problem/519/D
Had fun while solving this. Used map to store pairs of character and prefix sum values. Then used a linear algorithm to add values for all location while deleting previously occurred nodes. Did in NlogN.

## 19 MAY 2017

I only participated in a virtual contest on URI. Few of the good problems were —

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## 20 MAY 2017

Today I solved problems on snackdown qualifiers and hackerearth circuits. In night, I participated in round 415 DIV 2. The results were not very good. Was only able to solve 3 problems. I feel like I have difficulty with interactive problems. Will have to practice more.

Apart from the contests, I solved an extra problem on hackerrank.

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## 21 MAY 2017

Today I practise some problems on codeforces and spoj.

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## 22 MAY 2017

Today was an extremely bad day for me. I participated in a virtual contest and was able to solve only 2 problems. Realised how bad I am at geometry. So tomorrow is going to be an extensive practice session. I also solved one problem on hackerearth circuits. A bad day :(

## 23 MAY 2017

Today I solved a few problems and participated in a virtual contest. Guess something went wrong with CF. In the middle of virtual contest, It dumped me out of the contest, and when 45 min were left, It again brought back me in. I solved One problem on hackerearth circuits.

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## 24 MAY 2017

Still doing hackerearth circuits. Unable to do consecutive remainder. Still have to practice more maths.

## 25 MAY 2017

Practiced some easy problems on hackerearth and codeforces. The problems that I practiced on hackerearth were very easy. I cannot say the same for codeforces. Today's question were a bit harder.

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## 1 JUNE 2017

Just gave the contest on codeforces

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## 3 JUNE 2017

Doing Codechef Long Challange

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## 5 JUNE 2017

Did codechef long and participated in education codeforces round

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## 7 JUNE 2017

Did contest on codeforces

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## 10 JUNE 2017

Practised some simple problems on CF.

## 11 JUNE 2017

Solved MKTHNUM on spoj.

###### 1. http://codeforces.com/problemset/problem/579/C
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 » 12 months ago, # |   0 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # | ← Rev. 4 →   0 -edited- (it is the same as the next comment)
•  » » 12 months ago, # ^ |   0 Thanks ... :)
 » 12 months ago, # |   +6 Oh my, this is so gooooood...You should highlight the website of stopstalk.com btw. Already registered, ;)
 » 12 months ago, # |   0 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
•  » » 12 months ago, # ^ |   +7 you are welcome... I really love this site...
 » 12 months ago, # |   0 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   +9 i think this is a great idea this will be a great help for those who don't what to do next but try to also record what you done other than practice, meaning studying topics, team training, etc.
•  » » 12 months ago, # ^ |   0 Thanks
•  » » 12 months ago, # ^ |   0 thanks
 » 12 months ago, # |   +10 For H You can have a look at my submission code Just find maximum of all 4 take the answer Corner Case is for degenerate input matrix itself .For that answer is 0 as other matrix can be same. so Norm will be 0.
•  » » 12 months ago, # ^ |   0 thanks
 » 12 months ago, # |   +3 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   +6 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   +3 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   0 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   0 Good idea to keep yourself motivated :)
•  » » 12 months ago, # ^ |   +3 Thanks yaar :)
 » 12 months ago, # |   +3 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   +3 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   0 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
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 » 12 months ago, # |   0 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   +3 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   0 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   +1 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   +16 This is getting bigger everyday. Wow!I think you should create blog on blogspot or somewhere else and make one blog for each day.
•  » » 12 months ago, # ^ |   +11 Thanks... It is really good to know that people are reading it. And thanks for the suggestion. Will try that too. :)
 » 12 months ago, # |   +4 Thanks this is a great help to those of us are self learning and don't know what to do next
•  » » 12 months ago, # ^ |   +9 You are welcome. I am really glad that I could be of any help. :)
 » 12 months ago, # |   +5 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   +5 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   +3 use [stopstalk.com](https://www.stopstalk.com/) instead of stopstalk.com
 » 12 months ago, # |   0 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   +3 Amazing work ! I am thinking of doing the same too
•  » » 12 months ago, # ^ |   +3 Thanks for appreciation. :)
 » 12 months ago, # |   0 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 12 months ago, # |   +1 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).
 » 11 months ago, # |   +3 Auto comment: topic has been updated by satylogin (previous revision, new revision, compare).