Hi! I code a lot and play shogi and chess.

I developed several websites and enjoy coding games, if want help with code can help.

Recent topic~

—Matrices—

Absolute matrices would want use abs() function. e.g.:

n, m = map(int, input().split()) #n by m matrices, we use map so we can input like 3 5

for i in range(n): #get it in index

line = list(map(int, input().split())) #again same logic as line 1 with list

for i in range(m): #in index again

line[i] = abs(line[i]) #so we get the absolute value for every value

print(*line) #then we print the final matrix line by line

We can also count the number of times a number appears, e.g. 1 counnt for column:

n, m = map(int, input().split())

count = [0] * m

for i in range(n):

row = list(map(int, input().split()))

for j in range(m):

count[j] += row[j]

for count in count:

print(count)

so basically a matrix code but we add count in the code so it counts!

We can also make a n*m matrix m*n (called transpose):

n, m = map(int, input().split())

M = []

for i in range(n):

row = list(map(int, input().split()))

M.append(row)

m_2 = []

for j in range(m):

row2 = []

for i in range(n):

row2.append(M[i][j])

m_2.append(row2)

for row in m_2:

print(*row)

very clean logic i think

Also exchange lines in matrix —>

n, m, q = map(int, input().split()) #q is the number of exchanges

M = [list(map(int, input().split())) for i in range(n)]

for i in range(q):

x, y = map(int, input().split()) #the lines we are exchanging

M[x-1], M[y-1] = M[y-1], M[x-1] #bubble sort logic

for line in M:

print(*line)

Finally, symmetrical count in matrix:

n = int(input())

matrix = []

for i in range(n):

row = list(map(int, input().split()))

matrix.append(row)

count = 0

for i in range(n):

for j in range(n):

a = n - 1 - i

b = n - 1 - j

if (i < a) or (i == a and j < b):

if matrix[i][j] == matrix[a][b]:

count += 1

print(count)

Byakurai_987