# Ramon Villamangca

Learner and Math Enthusiast

**Programming Languages:**

C++, C, Javascript, MATLAB, Assembly

**Spoken Languages:**

English

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**Content Feed**

Solved

Determine if given number is perfect

A number is <http://en.wikipedia.org/wiki/Perfect_number perfect> if it is equal to the sum of its factors, excluding itself. ...

5 hours ago

Solved

Integer to boolean

Write a general function that will create the following conversation; Input is a column vector with integers Output is a b...

6 hours ago

Solved

Detect a number and replace with two NaN's

Write code which replaces the number 1 with two NaNs. Example X = [ 1 2 NaN 4 1 3 7 NaN 1 4 NaN 2] ...

6 hours ago

Solved

Create logarithmically spaced values (★)

Given three numbers a,b,n with b>a, create a vector y with n logarithmic spaced values between 10^a and 10^b. Thus, if a = -2, ...

6 hours ago

Solved

Sum of elements in a vector (★)

(copy of Prob. 3) Find the sum of all the numbers of the input vector x. Input x = [1 2 3 5] Output y is 11 <> ...

7 hours ago

Solved

I'm going to enjoy watching you calculate, Mr Anderson

Smith numbers are numbers such that if you add up all of the digits in the number, that sum equals the sum of all of the digits ...

7 hours ago

Solved

Leading-zero padding

Write a function that will add leading-zero padding to all numbers in the supplied vector, as necessary, based on the maximum nu...

8 hours ago

Solved

How to locate the position of an element in a vector without using the find function

(copy of prob 105 with test for find function) Write a function posX = *locatePos* (x,y) which returns the location o...

23 hours ago

Solved

Summing Rows and Columns

Create a matrix y of size (n+1) whose last column's elements are the summation of the elements of all the other columns and last...

24 hours ago

Solved

most frequent character

Obtain the most frequent character. For example, s='balaram'; output='a'; If there is a tie between letters, return t...

1 day ago

Solved

Looking for Squares

Need n squares that equal one square all together, none zero, none fractured. For example, calling squares(2) should output [16...

1 day ago

Solved

Sum of digit range

Example: If A is n1, and B is n2 digit positive numbers. A*B's digit range will be [c d] (c = min & d = max). Then return ...

1 day ago

Solved

Number Puzzles - 019

Borrowing the idea from Pascal Triangle, the following operation can be performed. Starting with an array of numbers from 1 to N...

1 day ago

Solved

Binary Inversion

Given the unsigned 8-bit integer x, return the number y which is the binary inversion of x. For example if x is 5, y should b...

1 day ago

Solved

MiniMax

Find the smallest value in array, which is the maximum of its row and column. Example: in array shown below are two numbers w...

2 days ago

Solved

Modular multiplicative inverse

Modular multiplicative inverse is used for _The Chinese Remainder Theorem_ and _RSA algorithm_. You can visit <http://en.wikiped...

2 days ago

Solved

COUNT VOWEL 2

The objective of this problem is to determine the number of unique vowels used in the given string. Now count vowels in STRI...

2 days ago

Solved

Pascal's Matrix

Given an integer n ≥ 0, generate the ( _n_+1) × ( _n_+1) lower triangular <http://en.wikipedia.org/wiki/Pascal_matrix P...

2 days ago

Solved

Raise Matrix to Power

For a given square matrix x and scalar a, find x^a without using '^' or 'mpower'.

4 days ago

Solved

Guess the Coefficients!

Given a polynomial _p_ known to have positive integer coefficients, deduce the values of the coefficients. For example: ...

4 days ago

Solved

Subtract two positive numbers

Given a and b as a string, return b-a without using string to number conversion functions. a and b must to be a same size and b ...

4 days ago