# li haitao

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**Content Feed**

Solved

Find the Best Hotels

Given three input variables: * |hotels| - a list of hotel names * |ratings| - their ratings in a city * |cutoff| - the rat...

11 maanden ago

Solved

Calculate Inner Product

Given two input matrices, |x| and |y|, check if their inner dimensions match. * If they match, create an output variable |z|...

11 maanden ago

Solved

Verify Law of Large Numbers

If a large number of fair N-sided dice are rolled, the average of the simulated rolls is likely to be close to the mean of 1,2,....

11 maanden ago

Solved

Mid-term report

You just got your mid-term report, but it's full of ones and twos :(. So before you give it to your parents, you change it, in o...

11 maanden ago

Solved

Problem for beginners

Suppose that x is a column vector, with at least a length of 6. Delete the 2., 6., and the second last row. Example: X=[1;2;3...

11 maanden ago

Solved

Problem for beginners

M is a nxm matrix. Swap the fist and the second last column with eachother. X=[1 2 3;4 5 6;7 8 9] Y=[2 1 3;5 4 6;8 7 9]

11 maanden ago

Solved

Stairs

Make an n by n matrix, where the elements are ones and zeros. In the main diagonal, and under that, there should be only ones (...

11 maanden ago

Solved

Square root

Given x (a matrix), give back another matrix, where all the elements are the square roots of x's elements.

11 maanden ago

Solved

Simple Matrix

Make the following matrix without typing it in one by one. [1 2 3; 2 4 6; 4 8 12] x=[1 2 3].

11 maanden ago

Solved

Lights Out 10 - 5x5, with wrapping, 6 moves

<https://en.wikipedia.org/wiki/Lights_Out_(game) Lights Out> is a logic game wherein all lights need to be turned off to complet...

11 maanden ago

Solved

Lights Out 11 - 5x5, with wrapping, x moves

<https://en.wikipedia.org/wiki/Lights_Out_(game) Lights Out> is a logic game wherein all lights need to be turned off to complet...

11 maanden ago

Solved

Lights Out 9 - 5x5, light-only solution? II

<https://en.wikipedia.org/wiki/Lights_Out_(game) Lights Out> is a logic game wherein all lights need to be turned off to complet...

11 maanden ago

Solved

Lights Out 8 - 5x5, light-only solution? I

<https://en.wikipedia.org/wiki/Lights_Out_(game) Lights Out> is a logic game wherein all lights need to be turned off to complet...

11 maanden ago

Solved

Lights Out 12 - 5x5, three stages, <7 moves

<https://en.wikipedia.org/wiki/Lights_Out_(game) Lights Out> is a logic game wherein all lights need to be turned off to complet...

11 maanden ago

Solved

Lights Out 14 - 5x5, four stages, x moves

<https://en.wikipedia.org/wiki/Lights_Out_(game) Lights Out> is a logic game wherein all lights need to be turned off to complet...

11 maanden ago

Solved

Lights Out 13 - 5x5, three stages, x moves

<https://en.wikipedia.org/wiki/Lights_Out_(game) Lights Out> is a logic game wherein all lights need to be turned off to complet...

11 maanden ago

Solved

Lights Out 15 - 5x5, broken buttons I

<https://en.wikipedia.org/wiki/Lights_Out_(game) Lights Out> is a logic game wherein all lights need to be turned off to complet...

11 maanden ago

Solved

Lights Out 7 - 5x5, x moves

<https://en.wikipedia.org/wiki/Lights_Out_(game) Lights Out> is a logic game wherein all lights need to be turned off to complet...

11 maanden ago

Solved

It's going down. We're finding simbers!

This problem is inspired by Project Euler 520: Simbers. "We define a simber to be a positive integer in which any odd digit, ...

11 maanden ago

Solved

Large Sum (inspired by Project Euler 13)

Your function will be provided an arbitrary number of numbers of arbitrary sizes as a cell array of strings. Some numbers will b...

11 maanden ago

Solved

Project Euler: Problem 16, Sums of Digits of Powers of Two

2^15 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26. What is the sum of the digits of the number 2^N? Thanks ...

11 maanden ago

Solved

Hexagonal numbers on a spiral matrix

Put hexagonal numbers in a ( m x m ) spiral matrix and return the sum of its diagonal elements. Formula of hexagonal numbers ...

11 maanden ago

Solved

Sums of cubes and squares of sums

Given the positive integers 1:n, can you: 1. Compute twice the sum of the cubes of those numbers. 2. Subtract the square...

11 maanden ago

Solved

Sum of big primes without primes

Inspired by Project Euler n°10 (I am quite obviously a fan). With problem n°250 by Doug, you can find some global methods to ...

11 maanden ago

Solved

Infinite precision division

Develop a function that will divide a very very large integer numerator, supplied to function as a string (e.g., '12233344445555...

11 maanden ago

Solved

How to multiply?

* Imagine you are in 3012 Anno Domini, when everyone must learn how to multiply, * and competing for the highly prestigious pos...

11 maanden ago