Xor sum

n, q = map(int, input().split())
arr = list(map(int, input().split()))
queries = []
for i in range(q):
    a, b = map(int, input().split())
    queries.append((a, b))

premade = [arr[0]]
for i in range(1, n):
    premade.append(premade[i - 1] ^ arr[i])


for a, b in queries:
    if a == 1:
        print(premade[b - 1])
    else:
        print(premade[a - 2] ^ premade[b - 1])

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED