Day 051

Kun masalalari:

🟢 101. Symmetric Tree
🟡 655. Print Binary Tree

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- expr

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
expr 3 + 5
expr length ABCdef

Javoblar:

🟢 404. Sum of Left Leaves
🟡 623. Add One Row to Tree

#SDM

@khamidulla_inoyatov_microblog

Day 052

Kun masalalari:

🟢 993. Cousins in Binary Tree
🟡 107. Binary Tree Level Order Traversal II

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- nslookup

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
nslookup


Javoblar:

🟢 101. Symmetric Tree
🟡 655. Print Binary Tree

#SDM

@khamidulla_inoyatov_microblog

Day 053

Kun masalalari:

🟢 112. Path Sum
🟡 129. Sum Root to Leaf Numbers

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- dig

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
dig

Javoblar:

🟢 993. Cousins in Binary Tree
🟡 107. Binary Tree Level Order Traversal II

#SDM

@khamidulla_inoyatov_microblog

Day 054

Kun masalalari:

🟢 572. Subtree of Another Tree
🟡 106. Construct Binary Tree from Inorder and Postorder Traversal

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- ifconfig

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
ifconfig -a


Javoblar:

🟢 112. Path Sum
🟡 129. Sum Root to Leaf Numbers

#SDM

@khamidulla_inoyatov_microblog

Day 055

Kun masalalari:

🟢 111. Minimum Depth of Binary Tree
🟡 109. Convert Sorted List to Binary Search Tree

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- iftop

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
iftop
iftop -i eth0
iftop -t


Javoblar:

🟢 572. Subtree of Another Tree
🟡 106. Construct Binary Tree from Inorder and Postorder Traversal

#SDM

@khamidulla_inoyatov_microblog

Day 056

Kun masalalari:

🟢 671. Second Minimum Node In a Binary Tree
🟡 113. Path Sum II

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- bzip2

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
dd if=/dev/urandom of=bigfile.txt bs=1M count=100
bzip2 bigfile.txt
ls -lh bigfile.txt*


Javoblar:

🟢 111. Minimum Depth of Binary Tree
🟡 109. Convert Sorted List to Binary Search Tree

#SDM

@khamidulla_inoyatov_microblog

Day 057

Kun masalalari:

🟢 222. Count Complete Tree Nodes
🟡 958. Check Completeness of a Binary Tree

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- bunzip2

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
dd if=/dev/urandom of=bigfile.txt bs=1M count=100
bzip2 bigfile.txt
ls -lh bigfile.txt*

mkdir zip_files
mv bigfile.txt.bz2 zip_files/
cd zip_files
bunzip2 bigfile.txt.bz2


Javoblar:

🟢 671. Second Minimum Node In a Binary Tree
🟡 113. Path Sum II

#SDM

@khamidulla_inoyatov_microblog

Day 058

Kun masalalari:

🟢 1464. Maximum Product of Two Elements in an Array
🟡 2336. Smallest Number in Infinite Set

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- route

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
route -n
sudo route add default gw 192.168.1.1
route -n
sudo route del default gw 192.168.1.1


Javoblar:

🟢 222. Count Complete Tree Nodes
🟡 958. Check Completeness of a Binary Tree

PS. Bugundan heap (priority queue) ga bog’liq bo’lgan masalalarni ishlashni boshlaymiz. Agar savollaringiz bo’lsa, tushuncha berib o’tishimiz mumkin.

#SDM

@khamidulla_inoyatov_microblog

Day 059

Kun masalalari:

🟢 2500. Delete Greatest Value in Each Row
🟡 451. Sort Characters By Frequency

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- tcpdump

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
sudo tcpdump -i eth0
sudo tcpdump port 80

Javoblar:

🟢 1464. Maximum Product of Two Elements in an Array
🟡 2336. Smallest Number in Infinite Set

#SDM

@khamidulla_inoyatov_microblog

Day 060

Kun masalalari:

🟢 2357. Make Array Zero by Subtracting Equal Amounts
🟡 1338. Reduce Array Size to The Half

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- arp

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
arp -n


Javoblar:

🟢 2500. Delete Greatest Value in Each Row
🟡 451. Sort Characters By Frequency

#SDM

@khamidulla_inoyatov_microblog

Day 061

Kun masalalari:

🟢 1337. The K Weakest Rows in a Matrix
🟡 1753. Maximum Score From Removing Stones

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- ndp

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
sudo ndp -n


Javoblar:

🟢 2357. Make Array Zero by Subtracting Equal Amounts
🟡 1338. Reduce Array Size to The Half

#SDM

@khamidulla_inoyatov_microblog

Tatil tugadi

Mana tatil xam tugadi 🏖️. Yil oxirigacha boshqa oylab qoygan maqsadlar tamon xarakat qilishda davom etamiz. Sizda qanday ketyapti?

Video credits: Durdona

P.S: Borgan joylarimni birma post shaklida yozib boraman.

Day 062

Kun masalalari:

🟢 2558. Take Gifts From the Richest Pile
🟡 215. Kth Largest Element in an Array

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- iptables

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
sudo iptables -A INPUT -s 140.82.121.3 -j DROP
<Try to open www.github.com on your browser>
sudo iptables -L --line-numbers
sudo iptables -D INPUT <rule_number>

NOTE: iptables komandasi bilan ishlayotganda extiyotkor bo’ling 🙂 
3-komandadigi <rule_number> ni 2-komandaning natijasidan olasiz 🙂

Javoblar:

🟢 1337. The K Weakest Rows in a Matrix
🟡 1753. Maximum Score From Removing Stones

#SDM

@khamidulla_inoyatov_microblog

Day 063

Kun masalalari:

🟢 1046. Last Stone Weight
🟡 1845. Seat Reservation Manager

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- lsmod

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
lsmod


Javoblar:

🟢 2558. Take Gifts From the Richest Pile
🟡 215. Kth Largest Element in an Array

#SDM

@khamidulla_inoyatov_microblog

Siz ishlaydigan IT companiyalarida staging server bormi? Staging server nima uchun keragligini bilasizmi? 🤔

Day 064

Kun masalalari:

🟢 506. Relative Ranks
🟡 378. Kth Smallest Element in a Sorted Matrix

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- strace

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
strace -o output.md ls -l

Javoblar:

🟢 1046. Last Stone Weight
🟡 1845. Seat Reservation Manager

#SDM

@khamidulla_inoyatov_microblog

Day 065

Kun masalalari:

🟢 2231. Largest Number After Digit Swaps by Parity
🟡 2679. Sum in a Matrix

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- ltrace

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.


cd ~
ltrace ls -l


PS. Kechagi komandaning natijasini - output.md file ni tekshirib ko’rdingizmi? 🙂

Javoblar:

🟢 506. Relative Ranks
🟡 378. Kth Smallest Element in a Sorted Matrix

#SDM

@khamidulla_inoyatov_microblog

Day 066

Kun masalalari:

🟢 2335. Minimum Amount of Time to Fill Cups
🟡 912. Sort an Array

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- time

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring.

cd ~
time ls -l

Javoblar:

🟢 2231. Largest Number After Digit Swaps by Parity
🟡 2679. Sum in a Matrix

#SDM

@khamidulla_inoyatov_microblog

Day 067

Kun masalalari:

🟢 703. Kth Largest Element in a Stream
🟡 692. Top K Frequent Words

O’qish uchun material:

*nix dagi quyidagi komanda bilan man <command> orqali tanishing:

- nohup

DIY:

*nix systemasda quyidagi komandalarni ketma-ket bajarib ko’ring. kill -9 <pid> dagi pid - bundan oldin bajarilgan pgrep -a ping ning natijasidan olingan.

cd ~
mkdir day067
cd day067
touch hello.sh
echo "#\!/bin/bash" > hello.sh
echo printf \"Hello, world\" >> hello.sh
chmod +x hello.sh
./hello.sh
nohup ./hello.sh
cat nohup.out

nohup ping google.com &
pgrep -a ping
kill -9 <pid>
cat nohup.out


Javoblar:

🟢 2335. Minimum Amount of Time to Fill Cups
🟡 912. Sort an Array

#SDM

@khamidulla_inoyatov_microblog

Ukam Khumoyun Inoyatov ni Amsterdam xaqida quyidagilarni yozgan.

Gollandiya - kanallar, velosipedlar va piyodalar yurti

Eng uzoq vaqt qolib eng bemalol aylangan shaharimiz aynan Amsterdam bo’ldi. Ob-havosi, tabiati, arxitekturasi, piyoda va velosipedchilarga bo’lgan munosbati bilan meni rom etgan bu shaharga qayta qayta tashrif buyurgan yoki yashagan bo’lardim. Shahar, ba’zi nuqtalarini hisobga olmasa juda tinch, huddi ertakka o’xshaydi, kanal bo’yiga qurilgan uy va binolar sizni qandaydir hikoya qahromanidek his qilishga undaydi.

Transport 🚋
Ko’chalarda mashinalar juda kam, shunga yarasha tiqilinchlik va signal ovozlari ham yo’q, avtomobillarning asosiy qismi elektromobillar va kam yoqilg'i sarflovchi gibrid avtomobillari, shaharda shuncha vaqt yashab, umuman tutagan va yoqimsiz hid qoldirgan avtomobillarni uchratganim yo’q. Velosipedda har qanday A nuqtadan B nuqtaga yetib olishingiz mumkin, deyarli 90% ko’chalarda alohida piyodalar va velosipedchilar uchun harakatlanish yo’llari mavjud. Velosipedlar huddi avtomobillardek yo’lning o’ng tomonidan o’ng qo’l qoidasiga asosan harakatlanishadi, burilish kerak bo’lganda har bir haydovchi qo’l ishoralari bilan qayerga burilmoqchiligini ko’rsatadi. Men ham velosipedda umumiy 60-80km masofani bosib o’tgan bo’lsam, tezgina qonun qoidalarga tushunib olib, shahar bilan uyg’unlashdim. Shahar kanallar bilan to’lgan, shunga yarasha ko’priklarning har qanday turini va qayiqlarda harakatlanayotgan mahalliy aholini ko’rishingiz mumkin, kimdur yumush bilan, kimdur shunchaki sayrga chiqgan. Jamoat transportining har qanday ko’rinishi bor, eng qulayi esa albatta tramvay. Nega shaharsozlik haqida blog yuritadigan Ilya Varlamov kabi bloggerlarni post-sovet davlatlarida tramvayni qaytarish kerakligi haqida bong urishini endi tushundim.

Mahalliy aholi 👫🏻
Menga eng yoqgan taraflaridan biri 99% aholi ingliz tilini biladi va sizga yordam kerak bo’lsa, hushmuomilalik bilan barchasini tushuntirib beradi. Ubu narsani tushuntirish va muloqatda bo’lish bilan umuman muammo bo’lmadi. Undan tashqari, agar liftga kirayotgan yoki chiqayotgan bo’lsangiz, begona insonlar siz bilan salomlashib, chiqib ketayotganda hayrli kun tilab ketishadi, bundan keyin albatta kunni yaxshi kayfiyatda o’tkazishingiz tabiiy.

Tabiat 🌳
Instagramga bir story qo’ygandim, “Butun shahar ekobog’dek” deb nomlangan, rostdan ham, shaharni har bir qismida bog’lar, o’rmonlar va ko’ngil ochar yashil maydonlar mavjud. U yerda shunchaki sayr qilsangiz ham bag’ri dilingiz yayraydi. Ayniqsa yomg’ir paytida va undan keyingi sayrda, o’pkangiz sizga rahmat aytib yuboradigan darajada havo toza va yoqimli hid keladi. Bepoyon dalalarda o’zi o’tlab yurgan golland sigirlari balki shuning uchun ham kuniga 40 litr sut berishar.

To’liqroq o’zini kanalida o’qishingiz mumkin.