Buggy python submission (verdict: Time Limit Exceeded):
import bisect
import collections
import copy
import functools
import heapq
import math
import sys
from collections import deque
from collections import defaultdict
input = sys.stdin.readline
MOD = 10**9+7

N = int(input())
A = list(map(int,(input().split())))
b = [0]*N
for i in range(N):
    b[i] = format(A[i],"b")
one = [[0]*20 for _ in range(N)]
for i in range(N):
    for j in range(20):
        if j < len(list(b[i])):
            one[i][j] = int(b[i][-(j+1)])

sumone = [[0]*20 for _ in range(N+1)]
for j in range(20):
    for i in range(1,N+1):
        sumone[i][j] = sumone[i-1][j] + one[i-1][j]
sumone.append([2]*20)

def ok(l,r):
    for j in range(20):
        if sumone[r][j] - sumone[l][j] >= 2:
            return False
    else:
        return True

ans = 0
r = 0
for l in range(N+1):
    flag = 0
    while r < N+2 and ok(l,r) and flag == 0:
        if r != N+1:
            r += 1
        else:
            flag = 1
            break
    ans += r-l-1

print(ans)

Fixed submission:
import bisect
import collections
import copy
import functools
import heapq
import math
import sys
from collections import deque
from collections import defaultdict
input = sys.stdin.readline
MOD = 10**9+7

N = int(input())
A = list(map(int,(input().split())))

ans = 0
r = 0
sum = 0
xor = 0
for l in range(N):
    while r < N and sum+A[r] == xor^A[r]:
        sum += A[r]
        xor ^= A[r]
        r += 1
    sum -= A[l]
    xor ^= A[l]
    ans += r-l

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import bisect
import collections
import copy
import functools
import heapq
import math
import sys
from collections import deque
from collections import defaultdict
input = sys.stdin.readline
MOD = 10**9+7

N = int(input())
A = list(map(int,(input().split())))
b = [0]*N
for i in range(N):
    b[i] = format(A[i],"b")
one = [[0]*20 for _ in range(N)]
for i in range(N):
    for j in range(20):
        if j < len(list(b[i])):
            one[i][j] = int(b[i][-(j+1)])

sumone = [[0]*20 for _ in range(N+1)]
for j in range(20):
    for i in range(1,N+1):
        sumone[i][j] = sumone[i-1][j] + one[i-1][j]
sumone.append([2]*20)

def ok(l,r):
    for j in range(20):
        if sumone[r][j] - sumone[l][j] >= 2:
            return False
    else:
        return True

ans = 0
r = 0
for l in range(N+1):
    flag = 0
    while r < N+2 and ok(l,r) and flag == 0:
        if r != N+1:
            r += 1
        else:
            flag = 1
            break
    ans += r-l-1

print(ans)

Fixed submission:
import bisect
import collections
import copy
import functools
import heapq
import math
import sys
from collections import deque
from collections import defaultdict
input = sys.stdin.readline
MOD = 10**9+7

N = int(input())
A = list(map(int,(input().split())))

ans = 0
r = 0
sum = 0
xor = 0
for l in range(N):
    while r < N and sum+A[r] == xor^A[r]:
        sum += A[r]
        xor ^= A[r]
        r += 1
    sum -= A[l]
    xor ^= A[l]
    ans += r-l

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import bisect
import collections
import copy
import functools
import heapq
import math
import sys
from collections import deque
from collections import defaultdict
input = sys.stdin.readline
MOD = 10**9+7

N = int(input())
A = list(map(int,(input().split())))
b = [0]*N
for i in range(N):
    b[i] = format(A[i],"b")
one = [[0]*20 for _ in range(N)]
for i in range(N):
    for j in range(20):
        if j < len(list(b[i])):
            one[i][j] = int(b[i][-(j+1)])

sumone = [[0]*20 for _ in range(N+1)]
for j in range(20):
    for i in range(1,N+1):
        sumone[i][j] = sumone[i-1][j] + one[i-1][j]
sumone.append([2]*20)

def ok(l,r):
    for j in range(20):
        if sumone[r][j] - sumone[l][j] >= 2:
            return False
    else:
        return True

ans = 0
r = 0
for l in range(N+1):
    while r < N+2 and ok(l,r):
        if r != N+1:
            r += 1
    ans += r-l-1

print(ans)

Fixed submission:
import bisect
import collections
import copy
import functools
import heapq
import math
import sys
from collections import deque
from collections import defaultdict
input = sys.stdin.readline
MOD = 10**9+7

N = int(input())
A = list(map(int,(input().split())))

ans = 0
r = 0
sum = 0
xor = 0
for l in range(N):
    while r < N and sum+A[r] == xor^A[r]:
        sum += A[r]
        xor ^= A[r]
        r += 1
    sum -= A[l]
    xor ^= A[l]
    ans += r-l

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import bisect
import collections
import copy
import functools
import heapq
import math
import sys
from collections import deque
from collections import defaultdict
input = sys.stdin.readline
MOD = 10**9+7

N = int(input())
A = list(map(int,(input().split())))
b = [0]*N
for i in range(N):
    b[i] = format(A[i],"b")
one = [[0]*20 for _ in range(N)]
for i in range(N):
    for j in range(20):
        if j < len(list(b[i])):
            one[i][j] = int(b[i][-(j+1)])

sumone = [[0]*20 for _ in range(N+1)]
for j in range(20):
    for i in range(1,N+1):
        sumone[i][j] = sumone[i-1][j] + one[i-1][j]
sumone.append([2]*20)

def ok(l,r):
    for j in range(20):
        if sumone[r][j] - sumone[l][j] >= 2:
            return False
    else:
        return True

ans = 0
r = 0
for l in range(N+1):
    flag = 0
    while r < N+2 and ok(l,r) and flag == 0:
        if r != N+1:
            r += 1
        else:
            flag = 1
            break
    ans += r-l-1

print(ans)

Fixed submission:
import bisect
import collections
import copy
import functools
import heapq
import math
import sys
from collections import deque
from collections import defaultdict
input = sys.stdin.readline
MOD = 10**9+7

N = int(input())
A = list(map(int,(input().split())))

ans = 0
r = 0
sum = 0
xor = 0
for l in range(N):
    while r < N and sum+A[r] == xor^A[r]:
        sum += A[r]
        xor ^= A[r]
        r += 1
    sum -= A[l]
    xor ^= A[l]
    ans += r-l

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
A = list(map(int,(input().split())))
b = [0]*N
for i in range(N):
    b[i] = format(A[i],"b")
one = [[0]*20 for _ in range(N)]
for i in range(N):
    for j in range(20):
        if j < len(list(b[i])):
            one[i][j] = int(b[i][-(j+1)])

sumone = [[0]*20 for _ in range(N+1)]
for j in range(20):
    for i in range(1,N+1):
        sumone[i][j] = sumone[i-1][j] + one[i-1][j]
sumone.append([2]*20)

def ok(l,r):
    for j in range(20):
        if sumone[r][j] - sumone[l][j] >= 2:
            return False
    else:
        return True

ans = 0
r = 0
for l in range(N+1):
    flag = 0
    while r < N+2 and ok(l,r) and flag == 0:
        if r != N+1:
            r += 1
        else:
            flag = 1
            break
    ans += r-l-1

print(ans)  

Fixed submission:
import bisect
import collections
import copy
import functools
import heapq
import math
import sys
from collections import deque
from collections import defaultdict
input = sys.stdin.readline
MOD = 10**9+7

N = int(input())
A = list(map(int,(input().split())))

ans = 0
r = 0
sum = 0
xor = 0
for l in range(N):
    while r < N and sum+A[r] == xor^A[r]:
        sum += A[r]
        xor ^= A[r]
        r += 1
    sum -= A[l]
    xor ^= A[l]
    ans += r-l

print(ans)