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pay it forward
Choose a number (integer between 0 and 65535) You will pass this problem if you are the *second* person to choose that same n...

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More Simple String Concatenation
Take the first string input, reverse the order of the string from the end to beginning (i.e. apple becomes elppa), add a space a...

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One track five lanes
Find the minimum number of lane changes necessary to cross the entire track without running into any obstacles <<http://www.a...

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Tautology
Check if the given expression is always true. For example, the sentence '~(A & B) == (~A | ~B)' is always true. Chara...

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nanoseconds passed today
Calculate the amount of nanoseconds passed in the current day of a certain date string.

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How many complete pizzas (number 2)
x is a vector with numbers of pizza slices. A corresponding vector n indicates in how many slices the pizza slices of x were cut...

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How many ways to write
How many ways to write a positive integer x as the sum of n numbers , where , x>n and no n number is less than -2.

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Prouhet–Tarry–Escott (basic)
Inspired by <http://www.mathworks.com/matlabcentral/cody/problems/660-find-a-subset-that-divides-the-vector-into-equal-halves pr...

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singularity 2.0 (easier)
If you have been in Cody long enough you have probably run across some badly constructed problems and test suites. This prob...

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Self-Description
This is a simplified version of the <http://xkcd.com/688/ *xkcd comic* by the same name>. Simply return the angle (in degrees...

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Free passes for everyone!
_Simply return the name of the coolest numerical computation software ever_ *Extra reward* (get a _freepass_): As an addit...

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Pandigital Multiples of 11 (based on Project Euler 491)
A "Pandigital number of order X" is one that contains all of the numbers from 0 to X, but with no leading zeroes. If X>9, the c...

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Megan's walk
Can you make <http://www.mathworks.com/matlabcentral/fileexchange/51139-megan-simulator--xkcd- Megan> (a stick-figure model of t...

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Just take it easy for a second or two!
Your code needs to take 'exactly' one second or 'exactly' two seconds to run (depending on the input) — accurate to ±0.5 millise...

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Wait a second!
Your code needs to take 'exactly' one second to run — accurate to ±0.5 milliseconds. The input will be the number of millis...

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Energy of a photon
*&#9883 &#9762 &#9883 &#9762 &#9883 &#9762 &#9883* Given the frequency F of a photon in giga hertz. Find energy E of this...

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Digit concentration in Champernowne's constant
Consider the first 50 digits of Champernowne's constant 0.12345678910111213141516171819202122232425262728293... The...

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Pair Primes
Let's define pair primes as follow; * *For 2 digits numbers:* 11 and 17 are pair primes because both of them are 2 digits pri...

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Parse me a Lisp
*Description* In Lisp and its variants, function calls are done using parenthesis where the first item in the parenthesis is ...

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Is it really a 5?
A number containing at least one five will be passed to your function, which must return true or false depending upon whether th...

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Group-wise Euclidean distance
*Input*: * *x* —— An array of size *n-by-d*, where each row vector denotes a point in a d-dimensional space; * *g* —— A gro...

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Birthday cake
It's Cody's 5th birthday, and you've been tasked with putting the candles on the cake. Your goal is to maximize the distance bet...

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Ned's Queens
A tribute to Cody's five-year anniversary should also celebrate the people behind Cody, and in this particular case, our illustr...

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The sliding puzzle: 3D
This is an extension of <https://www.mathworks.com/matlabcentral/cody/problems/42842 problem 42842>. In this case, the puzzle is...

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Number of Even Elements in Fibonacci Sequence
Find how many even fibonacci numbers are available in the first d numbers. Consider the following first 14 numbers 1 1 2...

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Acid and water
⚖ ⚖ ⚖ ⚖ ⚖ ⚖ ⚖ ⚖ Assume that there is a 100 liter tank. It is initially fi...

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"Cody" * 5 == "CodyCodyCodyCodyCody"
*Alice*: What? *"Cody" * 5 == "CodyCodyCodyCodyCody"*? You've gotta be kidding me! *Bob*: No, I am serious! Python supports...

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5th Time's a Charm
Write a function that will return the input value. However, your function must fail the first four times, only functioning prope...

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Sums of Distinct Powers
You will be given three numbers: base, nstart, and nend. Write a MATLAB script that will compute the sum of a sequence of both ...

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An asteroid and a spacecraft
&#128640 Imagine a non-relativistic simple situation. Assume positions p0, p1, p2, and p3 are three dimensional Cartesian ...

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