Xor sum

n, q = list(map(int, input().split()))
l = list(map(int, input().split()))
tab = [l[0],*[0]*(n-1)]
for j in range(1,n):
    tab[j] = tab[j-1]^l[j]

for query in range(q):
    a,b = list(map(int, input().split()))
    if a==1:
        print(tab[b-1])
    else:
        print(tab[b-1]^tab[a-2])

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED