#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
const int N = 2e5+10;
int n, q, arr[N], qt, t1[4*N], t2[4*N], len;
void init(){
int po;
if(pow(2, int(log2(n))) == n) po = int(log2(n));
else po = int(log2(n)) - 1;
len = pow(2, int(log2(n)))-1;
for(int i = 0; i <= len*2+10; i++) t1[i] = t2[i] = 0;
for(int i = 1; i <= n; i++){
if(i&1) t1[i+len] = arr[i];
else t2[i+len] = arr[i];
}
for(int i = len; i > 0; i--){
t1[i] = (t1[2*i] ^ t1[2*i+1]);
t2[i] = (t2[2*i] ^ t2[2*i+1]);
}
}
void update(int p, int val){
arr[p] = val;
if(p&1)
for(t1[p += len] = val; p > 1; p >>= 1) t1[p/2] = t1[p]^t1[p^1];
else
for(t2[p += len] = val; p > 1; p >>= 1) t2[p/2] = t2[p]^t2[p^1];
}
int ans(int l, int r){
int x = 0;
r++;
if(l & 1){
for(l += len, r += len; l < r; l >>= 1, r >>= 1){
if(l & 1) x ^= t1[l++];
if(r & 1) x ^= t1[--r];
}
}else{
for(l += len, r += len; l < r; l >>= 1, r >>= 1){
if(l & 1) x ^= t2[l++];
if(r & 1) x ^= t2[--r];
}
}
return x;
}
int main(){
cin.tie(0); ios::sync_with_stdio(0);
cin >> n >> q;
for(int i = 1; i <= n; i++) cin >> arr[i];
init();
while(q--){
int l, r;
cin >> qt >> l >> r;
if(qt == 1)
update(l, r);
else
cout << (((r - l + 1)&1) ? ans(l, r) : 0) << '\n';
}
return 0;
}
Compilation message
xoranges.cpp: In function 'void init()':
xoranges.cpp:9:9: warning: variable 'po' set but not used [-Wunused-but-set-variable]
9 | int po;
| ^~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
129 ms |
5764 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |