#include <iostream>
#include <vector>
std::vector<int> tree[2];
void build(int p, int u, std::vector<int> &V, int l, int r) {
if (l == r) {
tree[p][u] = V[l];
return;
}
int m = (l + r) / 2;
build(p, 2 * u, V, l, m);
build(p, 2 * u + 1, V, m + 1, r);
tree[p][u] = tree[p][2 * u] ^ tree[p][2 * u + 1];
}
void update(int p, int u, int l, int r, int pos, int val) {
if (l == r) {
tree[p][u] = val;
return;
}
int m = (l + r) / 2;
if (pos <= m) {
update(p, 2 * u, l, m, pos, val);
} else {
update(p, 2 * u + 1, m + 1, r, pos, val);
}
tree[p][u] = tree[p][2 * u] ^ tree[p][2 * u + 1];
}
int query(int p, int u, int l, int r, int ql, int qr) {
if (ql <= l && r <= qr) {
return tree[p][u];
}
int m = (l + r) / 2;
int lSide = 0, rSide = 0;
if (ql <= m) {
lSide = query(p, 2 * u, l, m, ql, qr);
}
if (qr > m) {
rSide = query(p, 2 * u + 1, m + 1, r, ql, qr);
}
return lSide ^ rSide;
}
int main() {
std::ios_base::sync_with_stdio(false);
std::cin.tie(nullptr);
std::cout.tie(nullptr);
int N, Q;
std::cin >> N >> Q;
std::vector<int> V(N);
for (int &x : V) {
std::cin >> x;
}
std::vector<int> A, B;
for (int i = 0; i < N; i++) {
(i % 2 == 0 ? A : B).push_back(V[i]);
}
tree[0].resize(4 * N);
tree[1].resize(4 * N);
build(0, 1, A, 0, (int)A.size() - 1);
build(1, 1, B, 0, (int)B.size() - 1);
for (int q = 0; q < Q; q++) {
int op, a, b;
std::cin >> op >> a >> b;
int posA = a / 2 - (1 - a % 2);
int posB = b / 2 - (1 - b % 2);
a--;
b--;
if (op == 1) {
update(a % 2, 1, 0, (a % 2 == 0 ? A.size() : B.size()) - 1, posA, b + 1);
} else {
std::cout << (b - a % 2 == 1 ? 0 : query(a % 2, 1, 0, (a % 2 == 0 ? A.size() : B.size()) - 1, posA, posB)) << "\n";
}
}
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
152 ms |
10340 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |