Buggy python submission (verdict: Time Limit Exceeded):
import collections as col
N=int(input())
A=[ai for ai in map(int,input().split())]
CA=col.Counter(A)
CA_KEYS=sorted(CA.keys())
#print(CA_KEYS)
for Ai in CA_KEYS:
    CA_Tmp={ai:0 for ai in CA_KEYS}
#    print()
    crnt=A[0]
    next=Ai
    CA_Tmp[crnt]=1
#    print(crnt, end=" ")
    if CA_Tmp[next] > CA[next]:
        continue
    Ans=True
    for j in range(1, N):
#        print(next,end=" ")
        if next in CA:
            CA_Tmp[next]+=1
            if CA_Tmp[next] > CA[next]:
                Ans=False
                break
            crnt,next=next,crnt^next
        else:
            Ans=False
            break
    if Ans==True:
        if next!=A[0]:
#            print("No!",next,"!=",A[0])
            Ans=False
        else:
            break


print("Yes" if Ans==True else "No")


Fixed submission:

import collections as col
N=int(input())
A=[ai for ai in map(int,input().split())]
Ans=False
CA=col.Counter(A)
if len(CA)==1 and 0 in CA:
    Ans=True
elif len(A)%3==0:
    if len(CA)==3:
        K=list(CA.keys())
        if (K[0]^K[1]==K[2]) and (CA[K[0]]==CA[K[1]]==CA[K[2]]):
            Ans=True
    elif len(CA)==2:
        K=list(sorted(CA.keys()))
        if CA[K[0]]*2==CA[K[1]]:
            Ans=True

print("Yes" if Ans==True else "No")

Buggy python submission (verdict: Time Limit Exceeded):
N=int(input())
A=[ai for ai in map(int,input().split())]
CA={}
for a in A:
    if a in CA:
        CA[a]+=1
    else:
        CA[a]=1
CA_KEYS=sorted(CA.keys())

for Ai in CA_KEYS:
    CA_Tmp={ai:0 for ai in CA_KEYS}
    crnt=A[0]
    next=Ai
    CA_Tmp[crnt]=1
    if CA_Tmp[next] > CA[next]:
        continue
    Ans=True
    for j in range(1, N):
        if next in CA:
            CA_Tmp[next]+=1
            if CA_Tmp[next] > CA[next]:
                Ans=False
                break
            crnt,next=next,crnt^next
        else:
            Ans=False
            break
    if Ans==True:
        if next!=A[0]:
            Ans=False
        else:
            break


print("Yes" if Ans==True else "No")


Fixed submission:

import collections as col
N=int(input())
A=[ai for ai in map(int,input().split())]
Ans=False
CA=col.Counter(A)
if len(CA)==1 and 0 in CA:
    Ans=True
elif len(A)%3==0:
    if len(CA)==3:
        K=list(CA.keys())
        if (K[0]^K[1]==K[2]) and (CA[K[0]]==CA[K[1]]==CA[K[2]]):
            Ans=True
    elif len(CA)==2:
        K=list(sorted(CA.keys()))
        if CA[K[0]]*2==CA[K[1]]:
            Ans=True

print("Yes" if Ans==True else "No")

Buggy python submission (verdict: Time Limit Exceeded):
N=int(input())
A=[ai for ai in map(int,input().split())]
CA={}
for a in A:
    if a in CA:
        CA[a]+=1
    else:
        CA[a]=1

for i in range(1,N):
    CA_Tmp={ai:0 for ai in CA.keys()}
    CA_Tmp[A[0]]=1
    CA_Tmp[A[i]]=1
    crnt=A[i]
    next=A[0]^A[i]
    Ans=True
    for j in range(2, N):
        if next in CA:
            CA_Tmp[next]+=1
            if CA_Tmp[next] > CA[next]:
                Ans=False
                break
            crnt,next=next,crnt^next
        else:
            Ans=False
            break
    if Ans==True:
        if next!=A[0]:
            Ans=False
        else:
            break

print("Yes" if Ans==True else "No")


Fixed submission:

import collections as col
N=int(input())
A=[ai for ai in map(int,input().split())]
Ans=False
CA=col.Counter(A)
if len(CA)==1 and 0 in CA:
    Ans=True
elif len(A)%3==0:
    if len(CA)==3:
        K=list(CA.keys())
        if (K[0]^K[1]==K[2]) and (CA[K[0]]==CA[K[1]]==CA[K[2]]):
            Ans=True
    elif len(CA)==2:
        K=list(sorted(CA.keys()))
        if CA[K[0]]*2==CA[K[1]]:
            Ans=True

print("Yes" if Ans==True else "No")