# Annoying input: [], [1]

• I got accepted using following code:

``````class Solution:
# @param A  a list of integers
# @param m  an integer, length of A
# @param B  a list of integers
# @param n  an integer, length of B
# @return nothing
def merge(self, A, m, B, n):
i=0
j=0
while i<len(A) and j<n:
if A[i]>=B[j]:
A.insert(i,B[j])
j+=1
i+=1
while j<n:
A.insert(m+j,B[j])
j+=1
``````

But I got wrong answer using following code on the input: [], [1]:

``````class Solution:
# @param A  a list of integers
# @param m  an integer, length of A
# @param B  a list of integers
# @param n  an integer, length of B
# @return nothing
def merge(self, A, m, B, n):
i=0
j=0
while i<len(A) and j<n:
if A[i]>=B[j]:
A.insert(i,B[j])
j+=1
i+=1
while j<n:
A.append(B[j])
j+=1
``````

or:

``````class Solution:
# @param A  a list of integers
# @param m  an integer, length of A
# @param B  a list of integers
# @param n  an integer, length of B
# @return nothing
def merge(self, A, m, B, n):
i=0
j=0
while i<len(A) and j<n:
if A[i]>=B[j]:
A.insert(i,B[j])
j+=1
i+=1
while j<n:
A.insert(len(A),B[j])
j+=1
``````

or:

``````class Solution:
# @param A  a list of integers
# @param m  an integer, length of A
# @param B  a list of integers
# @param n  an integer, length of B
# @return nothing
def merge(self, A, m, B, n):
i=0
j=0
while i<len(A) and j<n:
if A[i]>=B[j]:
A.insert(i,B[j])
j+=1
i+=1
A+=B[j:]
``````

It says my output is [0], however, the expected output is [1], which is the same as what I get on my computer. Just can not figure out the reason. Could anyone help me? Thank you!

• I got the same problem...

• me too...have no idea what went wrong

• I think the reason is the array A in the test case is not an empty array since the question mentioned its size is at least m+n. Thus, when you use .append or len(A), you get the real size of A and append to its end.

• i got the same problem, really annoying........................................

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