Buggy python submission (verdict: Runtime Error):
def main():
    n = int(input())
    a = list(map(int, input().split()))

    # Only when there is no bit duplication in a group,
    # it always meets the condition.
    # l <= true_l < true_r < r
    ans = n
    l = 0
    now = a[0]
    for r in range(1, n):
        if now & a[r] == 0:
            now = now ^ a[r]
            continue

        now = now ^ a[r]
        for new_l in range(r-1, l-1, -1):
            if a[new_l] & a[r] != 0:
                break
        try:
            new_l += 1
        except:
            while True:
                pass
        for i in range(l, new_l):
            now = now ^ a[i]

        ans += (r-l) * (r-l-1) // 2 - (r-new_l) * (r-new_l-1) // 2

        l = new_l

    r += 1
    ans += (r-l) * (r-l-1) // 2

    print(ans)

main()

Fixed submission:
def main():
    n = int(input())
    a = list(map(int, input().split()))

    if n == 1:
        print(1)
        exit()

    # Only when there is no bit duplication in a group,
    # it always meets the condition.
    # l <= true_l < true_r < r
    ans = n
    l = 0
    now = a[0]
    for r in range(1, n):
        if now & a[r] == 0:
            now = now ^ a[r]
            continue

        now = now ^ a[r]
        for new_l in range(r-1, l-1, -1):
            if a[new_l] & a[r] != 0:
                break
        # else:
            # print('Error')
            # exit()
        new_l += 1

        for i in range(l, new_l):
            now = now ^ a[i]

        ans += (r-l) * (r-l-1) // 2 - (r-new_l) * (r-new_l-1) // 2

        l = new_l

    r += 1
    ans += (r-l) * (r-l-1) // 2

    print(ans)

main()

Buggy python submission (verdict: Runtime Error):
def main():
    n = int(input())
    a = list(map(int, input().split()))

    # Only when there is no duplication in a group,
    # it always meets the condition.
    # l <= true_l < true_r < r
    ans = n
    l = 0
    now = a[0]
    for r in range(1, n):
        if now & a[r] == 0:
            now = now ^ a[r]
            continue

        now = now ^ a[r]
        for new_l in range(r-1, l-1, -1):
            if a[new_l] & a[r] != 0:
                break
        # else:
            # print('error')
            # exit()
        new_l += 1
        for i in range(l, new_l):
            now = now ^ a[i]

        ans += (r-l) * (r-l-1) // 2 - (r-new_l) * (r-new_l-1) // 2
        l = new_l

    r += 1
    ans += (r-l) * (r-l-1) // 2

    print(ans)

main()

Fixed submission:
def main():
    n = int(input())
    a = list(map(int, input().split()))

    if n == 1:
        print(1)
        exit()

    # Only when there is no bit duplication in a group,
    # it always meets the condition.
    # l <= true_l < true_r < r
    ans = n
    l = 0
    now = a[0]
    for r in range(1, n):
        if now & a[r] == 0:
            now = now ^ a[r]
            continue

        now = now ^ a[r]
        for new_l in range(r-1, l-1, -1):
            if a[new_l] & a[r] != 0:
                break
        # else:
            # print('Error')
            # exit()
        new_l += 1

        for i in range(l, new_l):
            now = now ^ a[i]

        ans += (r-l) * (r-l-1) // 2 - (r-new_l) * (r-new_l-1) // 2

        l = new_l

    r += 1
    ans += (r-l) * (r-l-1) // 2

    print(ans)

main()