Your code here...↵
↵
int n , q ;↵
cin >> n >> q ;↵
vector<int> arr(n);↵
for (int i = 0 ; i < n ; i++) {↵
cin >> arr[i];↵
}↵
while (n & (n
n++;↵
arr.pb(0);↵
}↵
vector<ll> seg(2 * n, 0 );↵
for (int i = 0 ; i < n ; i++) {↵
seg[n + i] = arr[i];↵
}↵
for (int i = n
seg[i] = (seg[2 * i] ^ seg[2 * i + 1]);↵
}↵
auto query = [&](int l , int r) {↵
l += n;↵
r += n;↵
ll ans = 0 ;↵
while (l < r) {↵
if (l & 1) ans = (ans ^ seg[l++]);↵
if (r & 1) ans = (ans ^ seg[--r]);↵
l /= 2; r /= 2;↵
}↵
return ans ;↵
};↵
auto update = [&](int pos , int val) {↵
pos += n;↵
seg[pos] = val ; ↵
while (pos > 1) {↵
pos /= 2;↵
seg[pos] = (seg[2 * pos] ^ seg[2 * pos + 1]);↵
}↵
};↵
while (q--) {↵
int type = 2 , l, r ;↵
cin >> l >> r ;↵
if (type == 2) {↵
l--; r;↵
cout << query(l, r) << endl;↵
}↵
else {↵
update(--l, r);↵
}↵
↵
}↵
}↵
~~~~~↵
↵
