Побудувати програму яка довільну матрицю А розмірами n - рядочків, m - стовбчиків спочатку заповнить 0 (нулями), а потім там де позначив викладач - запише 1 (одиницю). Матрицю потрібно вивести в загальноприйнтому вигляді,
Ответы
Відповідь:
def
modifyMatrix(mat) :
# variables to check if there are any 1
# in first row and column
row_flag
=
False
col_flag
=
False
# updating the first row and col
# if 1 is encountered
for
i
in
range
(
0
,
len
(mat)) :
for
j
in
range
(
0
,
len
(mat)) :
if
(i
=
=
0
and
mat[i][j]
=
=
1
) :
row_flag
=
True
if
(j
=
=
0
and
mat[i][j]
=
=
1
) :
col_flag
=
True
if
(mat[i][j]
=
=
1
) :
mat[
0
][j]
=
1
mat[i][
0
]
=
1
# Modify the input matrix mat[] using the
# first row and first column of Matrix mat
for
i
in
range
(
1
,
len
(mat)) :
for
j
in
range
(
1
,
len
(mat)
+
1
) :
if
(mat[
0
][j]
=
=
1
or
mat[i][
0
]
=
=
1
) :
mat[i][j]
=
1
# modify first row if there was any 1
if
(row_flag
=
=
True
) :
for
i
in
range
(
0
,
len
(mat)) :
mat[
0
][i]
=
1
# modify first col if there was any 1
if
(col_flag
=
=
True
) :
for
i
in
range
(
0
,
len
(mat)) :
mat[i][
0
]
=
1
# A utility function to print a 2D matrix
def
printMatrix(mat) :
for
i
in
range
(
0
,
len
(mat)) :
for
j
in
range
(
0
,
len
(mat)
+
1
) :
( mat[i][j], end
=
"" )
()
# Driver Code
mat
=
[ [
1
,
0
,
0
,
1
],
[
0
,
0
,
1
,
0
],
[
0
,
0
,
0
,
0
] ]
(
"Input Matrix :"
)
printMatrix(mat)
modifyMatrix(mat)
(
"Matrix After Modification :"
)
printMatrix(mat)