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https://repl.it/C6U5/3 created by charles2588
def printsprial(m,n):
arr=[]
count=0
for i in range(m):
arr.append([])
for j in range(n):
count+=1
arr[i].append(count)
print(arr)
topwall=0
rightwall=n-1
leftwall=0
bottomwall=m-1
count=0
i=1
while count<m*n:
if i==1:
j=leftwall
while j<=rightwall:
print(arr[topwall][j])
count+=1
j+=1
topwall+=1
i=2
if i==2:
j=topwall
while j<=bottomwall:
print(arr[j][rightwall])
count+=1
j+=1
rightwall-=1
i=3
if i==3:
j=rightwall
while j>=leftwall:
print(arr[bottomwall][j])
count+=1
j-=1
bottomwall-=1
i=4
if i==4:
j=bottomwall
while j>=topwall:
print(arr[j][leftwall])
count+=1
j-=1
leftwall+=1
i=1
printsprial(4,5)
Python 3.5.1 (default, Dec 2015, 13:05:11)
[GCC 4.8.2] on linux
>>> [[1, 2, 3, 4, 5], [6, 7, 8, 9, 10], [11, 12, 13, 14, 15], [16, 17, 18, 19, 20]]
1
2
3
4
5
10
15
20
19
18
17
16
11
6
7
8
9
14
13
12
=> None
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