Problem:
Set Difference Find the difference of two sets $A = \{a_0, a_1, ..., a_{n-1}\}$ and $B = \{b_0, b_1, ..., b_{m-1}\}$,  $A - B$. Input The input is given in the following format. $n$
$a_0 \; a_1 \; ... \; a_{n-1}$
$m$
$b_0 \; b_1 \; ... \; b_{m-1}$ Elements in $A$ and $B$ are given in ascending order. There are no duplicate elements in each set. Output Print elements in the difference in ascending order. Print an element in a line. Constraints  $1 \leq n, m \leq 200,000$  $0 \leq a_0 < a_1 < ... < a_{n-1} \leq 10^9$  $0 \leq b_0 < b_1 < ... < b_{m-1} \leq 10^9$  Sample Input 1 5
1 2 3 5 8
2
2 5 Sample Output 1 1
3
8

Solution (Python):
input()
a = set(list(map(int,input().split())))
input()
b = set(list(map(int,input().split())))

for i in sorted(a-b):
    print(i)

Solution (Python):
n = int(input())
a = set(map(int, input().split()))
m = int(input())
b = set(map(int, input().split()))
for i in sorted(a - b):
    print(i)

Solution (Python):
n = int(input())
a = set(map(int,input().split()))
m = int(input())
b = set(map(int,input().split()))
c = a - b
if c:
    print(*sorted(c),sep="\n")

Solution (Python):
n = int(input())
a = set(map(int, input().split()))
m = int(input())
b = set(map(int, input().split()))
s_difference = a.difference(b)
if s_difference:
    print(*sorted(s_difference), sep="\n")

Solution (Python):
def main():
    n = int(input())
    a = list(map(int,input().split()))
    m = int(input())
    b = list(map(int,input().split()))
    s = sorted(set(a)-set(b))
    for c in s:print (c)



if __name__ == '__main__':
    main()

Solution (Python):
n = int(input())
A = set(list(map(int, input().split())))
m = int(input())
B = set(list(map(int, input().split())))

answer = A.difference(B)
[print(i) for i in sorted(answer)]

Solution (Python):
a = input()
setA = set(map(int, input().split()))
b = input()
setB = set(map(int, input().split()))

for elem in sorted(setA.difference(setB)):
    print(elem)

Solution (Python):
input()
a = set(map(int, input().split()))
input()
b = set(map(int, input().split()))
[print(s) for s in map(str, sorted(list(a-b)))]

Solution (Python):
def main():
    n = int(input())
    a = set([int(a) for a in input().split()])
    m = int(input())
    b = set([int(a) for a in input().split()])

    c = a.difference(b)
    sorted_c = sorted(c)
    for i in sorted_c:
        print(i)
main()

Solution (Python):
n=input()
a=set(map(int, input().split()))
m=input()
b=set(map(int, input().split()))
c={print(x) for x in sorted(set(a^b)) if x in a}

Solution (Python):
input()
A = [int(x) for x in input().split() ]
input()
B = [int(x) for x in input().split() ]

for i in sorted(set(A)-set(B)):
    print(i)

Solution (Python):
n = int(input())
a = set(map(int, input().split()))
m = int(input())
b = set(map(int, input().split()))

for n in sorted(a - b): print(n)

Solution (Python):
n = int(input())

a = {int(i) for i in input().split()}

m = int(input())

b = {int(i) for i in input().split()}

c = tuple(sorted(a-b))

for i in c:
    print(i)

Solution (Python):
n = int(input())
a = set(map(int, input().split( )))
m = int(input())
b = set(map(int, input().split( )))
sb = a-b

ans = list(sb)
ans.sort()
for i in ans:
    print(i)

Solution (Python):
if __name__ == "__main__":
    n = int(input())
    a = set(map(lambda x: int(x), input().split()))
    m = int(input())
    b = set(map(lambda x: int(x), input().split()))

    for elem in sorted(a - b):
        print(elem)

Solution (Python):

"""
Set Operation - Set Difference
http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=ITP2_9_C&lang=jp

"""
_ = input()
A = set([int(a) for a in input().split()])
_ = input()
B = set([int(b) for b in input().split()])
C = sorted([d for d in (A - B)])
if C:
    print(*C, sep='\n')

Solution (Python):
N = int(input())
A = set(map(int, input().split()))
M = int(input())
B = set(map(int, input().split()))
C = A - B
if C:
    print(*sorted(C), sep='\n')

Solution (Python):
if __name__ == '__main__':

	input()
	A = set(map(int,input().split()))
	input()
	B = set(map(int,input().split()))

	C = sorted(A-B)

	for i in C:
		print(i)

Solution (Python):
n=int(input())
a=set(map(int,input().split()))
m=int(input())
b=set(map(int,input().split()))
if a-b:
  print(*sorted(a-b),sep='\n')

Solution (Python):
n = int(input())

A = set(map(int, input().split()))

m = int(input())

B = set(map(int, input().split()))

for c in sorted(list(A - B)):
    print(c)

Solution (Python):
input()
a = set(list(map(int,input().split())))
input()
b = set(list(map(int,input().split())))
ans = a-b
ans = sorted(list(ans))
for i in ans:
    print(i)

Solution (Python):
n = int(input())
A = set(map(int, input().split()))
m = int(input())
B = set(map(int, input().split()))
C = A-B
if C:
    print(*sorted(C), sep='\n')

Solution (Python):
n=int(input())
A=list(map(int,input().split()))

m=int(input())
B=list(map(int,input().split()))

C=list(set(A)-set(B))
C.sort()

if C!=[]:
    print('\n'.join(map(str,C)))

Solution (Python):
input()
A = set(int(x) for x in input().split())
input()
B = set(int(x) for x in input().split())

for i in sorted(A - B):
    print(i)

Solution (Python):
input()
s1 = set(map(int, input().split()))
input()
s2 = set(map(int, input().split()))

s = sorted(list(s1.difference(s2)))

if len(s) != 0:
    print('\n'.join(map(str, s)))

Solution (Python):
n = int(input())
alist = list(map(int, input().split()))
m = int(input())
blist = list(map(int, input().split()))

anslist = set(alist) ^ set(blist)
anslist = set(alist) & set(anslist)
anslist = list(anslist)
anslist.sort()

for ans in anslist:
    print(ans)

Solution (Python):
N = int(input())
A = set(map(int, input().split()))
M = int(input())
B = set(map(int, input().split()))
C = A - B
if C:
    print(*sorted(C), sep='\n')

Solution (Python):




def diff(n, m, a, b):
    i, j = 0, 0
    while i < n and j < m:
        if a[i] < b[j]:
            yield a[i]
            i += 1
        elif a[i] > b[j]:
            j += 1
        else:
            i += 1
            j += 1

    while i < n:
        yield a[i]
        i += 1


def run():
    n = int(input())
    a = [int(i) for i in input().split()]
    m = int(input())
    b = [int(j) for j in input().split()]

    for v in diff(n, m, a, b):
        print(v)


if __name__ == '__main__':
    run()

Solution (Python):
n = int(input())
a = set(list(map(int, input().split())))
m = int(input())
b = set(list(map(int, input().split())))
for i in sorted(a-b):
    print(i)