So you have a computer, but if it was

**infected with a virus,***what would you do?*Would you even know it was there? It is a well-known fact that over 32% of all computers in the world have malware of some sort. Today we will be talking about the infamous computer virus and what it is.So let’s start with something you all have probably heard of, Malware.

**Let’s get to know them and how much of the 32% they infect.***Malware is a program made to infiltrate your computer, disable parts of it, and thus gain access to your hard drive, search history and such to aid with stealing information. However, there are other types of malware out there.*At 57%, first we have the virus. This is a software that has the capability to copy itself and send itself into other folders. Then there is the “Trojan” at 21%. The Trojan is malicious software that hides on the internet disguised as some sort of program or free item, and ce you download it, you will soon discover it is malicious. But the Trojan has a brother at 7%, called the “Trojan Downloader”. This type of virus does the same thing as the simple Trojan, but once on your computer it downloads more viruses and software, then begins to use those programs.

Then at 3% there is the “Exploit”, which finds a glitch, bug or system error and uses that to hack into your computer. Next we have the “Worm” at 2%, this malicious bug works the same as a Trojan, but then copies and pastes itself across your computer network.

But not all viruses seem so bad when you get them, for instance the “Adware” at 3%. This type of virus infects your computer so nothing happens at first, but once you log into your web browser, then immediately your screen will be flooded with ads. There is also the “Monitoring Tool” with 2% of the 32% infected. This malware infects your computer and hides, not doing anything but monitoring your activity, (Search history, keyboard history etc.) and then sends those back to a remote server.

*There is also one of the worst at 1%, the “Back Door”.**This virus infects your computer remotely, not allowing your anti-virus security to even detect it, but sure enough it does.*And lastly we have one of the worst but luckily at a low percentage of 0.01%, “Spyware”. This diabolically designed software infects your computer and takes the most important pieces of information it can find and sends it back to wherever it came from. This information is generally passwords, credit card numbers and other sensitive information.

All of these viruses have devastating effects. Last year there were 27 million strains of malware made,

**The number of homes in the United States that experience spam is 24 million. The number of homes with serious viruses in the last 2 years is 16 million, and the number of houses that had spyware in the last 6 months is 6 million. But most devastating of all, over 1 million of all homes have lost money to spyware in the last year. Another devastating fact is that Viruses cost the world 4.55 billion USD every year.***which means 74,000 new viruses are created every day.*

*So be safe, don’t download anything you are unsure of, and be sure to have an anti-virus software. But most importantly learn how to detect these programs when you get them.*

Page Contents

*March Long Challenge 2021 Solutions*

*March Long Challenge 2021 Solutions*

*An Interesting Sequence ISS SOLUTION**Tree House THOUSES SOLUTION**Valid Paths VPATH SOLUTION**Modular Equation MODEQ SOLUTION**Tic Tac Toe TCTCTOE SOLUTION**Xor Equality XOREQUAL SOLUTION**Golf LKDNGOLF SOLUTION**Solubility SOLBLTY SOLUTION*

*April Long Challenge 2021 Solutions*

*April Long Challenge 2021 Solutions*

*Chef and Dice SDICE Solution**Worthy Matrix KAVGMAT Solution**Binary String MEX MEXSTR Solution**Boolean Game BOOLGAME Solution**Tree Permutations TREEPERM Solution**Destroy the EMP Chip CHAOSEMP Solution**Chef and Pair Flips PAIRFLIP Solution**String Power STRPOW Solution**Brahma and Shiva SHRINES Solution**Water Sort Puzzle (Challenge) WTRSORT Solution**World Record BOLT Solution**Strong Language SSCRIPT Solution**Valid Pair SOCKS1 Solution*

*Codechef Long Challenge Solutions*

*Codechef Long Challenge Solutions*

*February Long Challenge 2021*

*February Long Challenge 2021*

#### 1. Frog Sort Solution Codechef

#### 2. Chef and Meetings Solution Codechef

#### 3. Maximise Function Solution Codechef

#### 4. Highest Divisor Solution Codechef

#### 5. Cut the Cake Challenge Solution Codechef

#### 6. Dream and the Multiverse Solution Codechef

#### 7. Cell Shell Solution Codechef

#### 8. Multiple Games Solution Codechef

#### 9. Another Tree with Number Theory Solution Codechef

#### 10. XOR Sums Solution Codechef

#### 11. Prime Game Solution CodeChef

#### 12. Team Name Solution Codechef

### January Long Challenge 2021

**Chef and Division 3 DIVTHREE SOLUTION Code Chef****Encoded String DECODEIT SOLUTION Code Chef****Point Of Impact BILLRD SOLUTION Code Chef****Fair Elections FAIRELCT SOLUTION Code Chef****Watching CPL WIPL SOLUTION Code Chef****Chef and Ants ANTSCHEF SOLUTION Code Chef****Blackjack BLKJK SOLUTION Code Chef****And-Or Game ORAND SOLUTION Code Chef****Stack-Queue Sort (Challenge) SQSORT SOLUTION Code Chef****Expected Number of SCCs RCTEXSCC SOLUTION Code Chef****Curious Matrix CURMAT SOLUTION Code Chef****Cool Subsets COOLSBST SOLUTION Code Chef****Sequence Creation ARCRT SOLUTION Code Chef****Greedy Students GRDSTD SOLUTION Code Chef**

### November Challenge 2020 SOLUTION CodeChef

- Ada and Dishes SOLUTION ADADISH
- Iron Magnet and Wall SOLUTION FEMA2
- Magical Candy Store SOLUTION CNDYGAME
- Unusual Queries SOLUTION UNSQUERS
- Red-Black Boolean Expression SOLUTION RB2CNF
- Chef and the Combination Lock SOLUTION CHEFSSM
- Scalar Product Tree SOLUTION SCALSUM
- Connect on a Grid (Challenge) SOLUTION CONGRID

### October Lunchtime 2020 CodeChef SOLUTIONS

- AND Plus OR SOLUTION ANDOR
- Chef and Subtree MEXs SOLUTION SUBMEXS
- Chef Likes Good Sequences SOLUTION GSUB
- Cute Chef Gift SOLUTION COPAR
- Chef Is Just Throwing Random Words SOLUTION SSO
- Counting Spaghetti SOLUTION CDSUMS
- Chef and Edge Flipping SOLUTION EFLIP

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*A. Shandom Ruffle SOLUTION**B. Pear TreaP SOLUTION**C. Sneetches and Speeches 3 SOLUTION**D. The Grim Treaper SOLUTION**Y. Sneetches and Speeches 1 SOLUTION**Z. Trick or Treap SOLUTION**A. Floor Number SOLUTION CODE FORCES**B. Symmetric Matrix SOLUTION CODE FORCES**C. Increase and Copy SOLUTION CODE FORCES**D. Non-zero Segments SOLUTION CODE FORCES**E. Rock, Paper, Scissors SOLUTION CODE FORCES**F. Number of Subsequences SOLUTION CODE FORCES*

*Related :*

*Chef and Easy Queries SOLUTIONS CHEFEZQ**Covid Run SOLUTIONS CVDRUN OCTOBER CHALLENGE**Positive AND SOLUTIONS POSAND**Replace for X SOLUTIONS REPLESX**Village Road Network SOLUTIONS VILLNET**Random Knapsack SOLUTIONS RANDKNAP**D-Dimensional MST SOLUTIONS DDIMMST**Compress all Subsegments SOLUTIONS SEGCOMPR**Adding Squares SOLUTIONS ADDSQURE**Inversions SOLUTIONS INVSMOD2 OCOTBER CHALLENGE**Rooted Minimum Spanning Tree SOLUTIONS ROOTMST*