my_list = [13, 34, 26, 58, 14, 32, 16, 89]

print("The list is :")
print(my_list)

K = 2
print("The value of K is :")
print(K)

N = 99
print("The value of N is :")
print(N)

for index in range(K):

   my_list[index] = N

print("The result is :")
print(my_list)

The list is :
[13, 34, 26, 58, 14, 32, 16, 89]
The value of K is :
2
The value of N is :
99
The result is :
[99, 99, 26, 58, 14, 32, 16, 89]