This is a graph short path problem. Build a Graph data structure. If the cell (x,y) is a camera, special handle the row x, and the column...

The boundaries of a neighbourhood are defined by the two adjacent villages. 1. Sort the villages,. 2. Compute the midpoint of each...

CCC 2019 S3:Arithmetic Square Case 1: 1 x Case 2: 2 x Case 3: 3 x Case 4: 4 x We can set row by row , the column by column, you can...

Matrix rotated anti clockwise 90 degree, next 90 degree (180 degree), next 90 degress(270 degree), next 90 degree(360 degree). Look the...

For this problem, we can use a simple for-loop to generate values of a and b.Set a=i and b=2n−i. Loop it through the integers from 2 to...

It is easy , swap rows or swaps columns by 'H' or 'V' rawM = [[1,2], [3,4]] def hFlip(): t = rawM[0][0] rawM[0][0] = rawM[1][0]...

Perform a depth-first search (DFS) on the cells. There areN2cells and individually finding the factors of each number. For a faster...

Sort the points by time. Then loop through consecutive pairs to find the constant speed over each interval. The answer is the maximum of...

Let S be a substring of H with length |N| To check whether S is a permutation of H, keep a count of each of the 26 letters of the...

https://cemc.uwaterloo.ca/contests/computing/2019/stage%201/juniorEF.pdf Build two lists wordsrc and worddst to simulate a dictionary....