Binbin Qi

Last seen: Today

China University of Petroleum

3.737 total contributions since 2009

Professional Interests: Machine Learning/ Math/ Geophysics

Contact

Binbin Qi's Badges

View all

Solved

leap year
find the number of leap years within the given time interval

3 dagen ago

Solved

Last non-zero digit
Given a number n, find the last non-zero digit of the factorial of that number. You need to take care of the large values of n....

9 dagen ago

Solved

Positive Definiteness of a Matrix
Determine if input matrix is positive definite or not.

9 dagen ago

Solved

Find index of non empty cell array
This question aims to understand the characteristics of MATLAB programs. Educational problem. Please find empty index of cell...

15 dagen ago

Solved

MinMax
* x=[2 4 3 1 6 4 6] * output , y=[1 6 2 4 3] here,y(1) is the minimum of x, y(2) is the maximum of x, y(3) is the 2nd mini...

17 dagen ago

Solved

24 dagen ago

Solved

Find the centroid of triangle
Imagine that you want to calculate the *centroid* of some _triangles_ given in matrix form. First the coordinates of the vertice...

28 dagen ago

Solved

Calculate triangle area
Imagine that you want to calculate the areas of some triangles given in matrix form. First the coordinates of the vertices of th...

28 dagen ago

Solved

Solve Sudoku puzzle step by
Sudoku is a famous puzzle. <https://en.wikipedia.org/wiki/Sudoku> Give a standard sudoku by a matrix (9*9), You need give a ...

28 dagen ago

Problem

Solve Sudoku puzzle step by
Sudoku is a famous puzzle. <https://en.wikipedia.org/wiki/Sudoku> Give a standard sudoku by a matrix (9*9), You need give a ...

28 dagen ago | 0

Solved

Find the sequence
Find the nth number of a sequence. Check the test suite to determine the sequence. * hint: it is closely related to familiar ...

ongeveer een maand ago

Solved

Zero
given an integer a, find the smallest possible integer b(b>0) such that their bitwise logical AND is zero. * if a=11(1011) t...

ongeveer een maand ago

Solved

Subdivide the Segment
Two points, P1 and P2, with integer x-y coordinates are given. These uniquely determine a third point, P0, on the extended line...

ongeveer een maand ago

Solved

Remove duplicated vertices
First input V_in is a vertices list (X Y Z coordinates) which may contain duplicata (identical rows). Second input T_in is th...

ongeveer een maand ago

Solved

Rotate a matrix without using rot90
rotate the input square matrix by certain degrees (e.g. 270 or 450 etc.) without using rot90 or flip function. its an extension...

ongeveer een maand ago

Solved

Query edges list
Input T is a triangulation connectivity indices list (triplet list of indices -positive integers-, each index refering to a vert...

ongeveer een maand ago

Solved

Find neighbor triangle indices
First input T is a triangulation (triplet list of indices -positive integers-, each index refering to a vertex number in a corre...

ongeveer een maand ago

Solved

Query a vertex neighbors
First input T is a triangulation connectivity indices list (triplet list of indices -positive integers-, each index refering to ...

ongeveer een maand ago

Solved

Find triangles from edge
First input is T, a Triplet list of indices -whom each row actually contains the three indices of a triangle vertices-. size(T) ...

ongeveer een maand ago

Solved

Remove duplicated triangles
Input T is a triangulation (triplet list of indices -positive integers-, each index refering to a vertex number in a correspondi...

ongeveer een maand ago

Solved

Restricted Addition v4
This problem is <https://www.mathworks.com/matlabcentral/cody/problems/45264-restricted-addition-v3 Restricted Addition v3> with...

ongeveer een maand ago

Solved

Query every vertices neighbor indices
Input T is a <https://fr.mathworks.com/help/matlab/ref/triangulation.html triangulation>. The purpose of this function is to ...

ongeveer een maand ago

Solved

Alternate list of elements
Write a function that combines two lists by alternating the elements, e.g. ['a','b','c'], ['1','2','3'] → 'a1b2c3'.

ongeveer een maand ago

Solved

Restricted Addition v3
This problem is <https://www.mathworks.com/matlabcentral/cody/problems/45258-restricted-addition-v2 Restricted Addition v2> with...

ongeveer een maand ago

Solved

Restricted Addition v2
This problem is <https://www.mathworks.com/matlabcentral/cody/problems/45252 Restricted Addition v1> with more restrictions. Als...

ongeveer een maand ago

Solved

Restricted Addition v1
Add two numbers without use of common arithmetic operations. Unfortunately, in order to enforce this restriction, other restrict...

ongeveer een maand ago

Solved

Frugal number
check whether n is a frugal number

ongeveer 2 maanden ago

Solved

The length of the equal sides of an isoceles triangle is 'a'.For all the possible (integer) values of the remaining side,find the associated angles between the two equal sides.
the remaining side may have many possible values.only assume integer ones for simplicity.

ongeveer 2 maanden ago

Solved

Take a binary number as input,rearrange it in any manner such that its value is greater than the original one.output should be all the possible values in decimal.
a='001' output = [4,2]

ongeveer 2 maanden ago

Solved

An n-sided regular polygon is drawn within a circle whose radius is 'r', what will be the area of the polygon?
area of a polygon is p*a/2. where, p is the perimeter and a is the apothem i.e. the normal distance from center to any of the ...