Buggy python submission (verdict: Runtime Error):
n = int(input())
a = list(map(int,input().split()))
if a.count(0) == n:
    print("Yes")
else:
  if n % 3 != 0:
    print("No")
  else:
    s = set(a)
    if len(s)>3:
      print("No")
    elif len(s)==2:
      if a.count(0) == n/3:
        print("Yes")
      else:
        print("No")
    else:
      l = list(s)
      if (l[0]^l[1] == l[2] and l[1]^l[2] == l[0] and l[2]^l[0] == l[1]) and (a.count(l[0])==n/3 and a.count(l[1])==n/3):
        print("Yes")
      else:
        print("No")

Fixed submission:
n = int(input())
a = list(map(int,input().split()))
if a.count(0) == n:
    print("Yes")
else:
  if n % 3 != 0:
    print("No")
  else:
    s = set(a)
    if len(s)>3 or len(s)==1:
      print("No")
    elif len(s)==2:
      if a.count(0) == n/3:
        print("Yes")
      else:
        print("No")
    else:
      l = list(s)
      if (l[0]^l[1] == l[2] and l[1]^l[2] == l[0] and l[2]^l[0] == l[1]) and (a.count(l[0])==n/3 and a.count(l[1])==n/3):
        print("Yes")
      else:
        print("No")

Buggy python submission (verdict: Runtime Error):
n = int(input())
a = list(map(int,input().split()))
if a.count(0) == n:
    print("Yes")
else:
  if n % 3 != 0:
    print("No")
  else:
    s = set(a)
    if len(s)>3:
      print("No")
    elif len(s)==2:
      if a.count(0) == n/3:
        print("Yes")
      else:
        print("No")
    else:
      l = list(s)
      if (l[0]^l[1] == l[2] and l[1]^l[2] == l[0] and l[2]^l[0] == l[1]) and (a.count(l[0])==n/3 and a.count(l[1])==n/3):
        print("Yes")
      else:
        print("No")

Fixed submission:
n = int(input())
a = list(map(int,input().split()))
if a.count(0) == n:
    print("Yes")
else:
  if n % 3 != 0:
    print("No")
  else:
    s = set(a)
    if len(s)>3 or len(s)==1:
      print("No")
    elif len(s)==2:
      if a.count(0) == n/3:
        print("Yes")
      else:
        print("No")
    else:
      l = list(s)
      if (l[0]^l[1] == l[2] and l[1]^l[2] == l[0] and l[2]^l[0] == l[1]) and (a.count(l[0])==n/3 and a.count(l[1])==n/3):
        print("Yes")
      else:
        print("No")

Buggy python submission (verdict: Runtime Error):
n = int(input())
a = list(map(int,input().split()))
#n = 3
#a = [1,0,1]
if a.count(0) == n:
    print("Yes")
else:
  if n % 3 != 0:
    print("No")
  else:
    s = set(a)
    if len(s)>3:
      print("No")
    elif len(s)==2:
      if a.count(0)==n/3:
        print("Yes")
      else:
        print("No")
    else:
      l = list(s)
      if (l[0]^l[1] == l[2] and l[1]^l[2] == l[0] and l[2]^l[0] == l[1]) and (a.count(l[0])==n/3 and a.count(l[1])==n/3):
        print("Yes")
      else:
        print("No")

Fixed submission:
n = int(input())
a = list(map(int,input().split()))
if a.count(0) == n:
    print("Yes")
else:
  if n % 3 != 0:
    print("No")
  else:
    s = set(a)
    if len(s)>3 or len(s)==1:
      print("No")
    elif len(s)==2:
      if a.count(0) == n/3:
        print("Yes")
      else:
        print("No")
    else:
      l = list(s)
      if (l[0]^l[1] == l[2] and l[1]^l[2] == l[0] and l[2]^l[0] == l[1]) and (a.count(l[0])==n/3 and a.count(l[1])==n/3):
        print("Yes")
      else:
        print("No")