Program to Segregate 0s on Left Side & 1s on right side of the Array

Method-1 

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

i,j=0,len(a)-1

while i<j:

    while a[i]==0 and i<j:

        i+=1

    while a[j]==1 and i<j:

        j-=1

    if i<j:

        a[i]=0

        a[j]=1

        i+=1

        j-=1

print(a)

Method-2

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

c=0

for i in range(len(a)):

    if a[i]==0:

        c+=1

for i in range(c):

    a[i]=0

for i in range(c,len(a)):

    a[i]=1

print(a)

        

  Input: 1 0 1 0 1 1 1 0 0 1 0 Output: 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1