i am not able to submit this code in hackerank python?

# Enter your code here. Read input from STDIN. Print output to STDOUT N=int(input()) M=int(input())

b="welcome"

for i in range(1,N+1):

if i<(N+1)/2:
    s = ".|." * (2 * i - 1)
    print(s.center(M,'-'))
    k=2*i-1
if i==(N+1)/2:
    print(b.center(M,'-'))
if i>((N+1)/2):
    l=".|."*k
    print(l.center(M,'-'))
    k=k-2

this code is running properly in pycham but hackerrank says compile time erro