This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
void mjenj(int ind,int val,vector<int>& lis){
ind+=lis.size()/2;
lis[ind]=val;
while (ind>0){
ind/=2;
lis[ind]=lis[ind*2]^lis[ind*2+1];
}
}
int que(int l,int r,vector<int>& lis,int ind,int l2,int r2){
int lpom=l;
int rpom=r;
l+=lis.size()/2;
r+=lis.size()/2;
if (l<=l2 && r>=r2){
return lis[ind];
}
if (r<l2 || l>r2){
return 0;
}
return que(lpom,rpom,lis,ind*2,l2,(l2+r2)/2)^que(lpom,rpom,lis,ind*2+1,(r2+l2)/2+1,r2);
}
int main(){
int n;
int q;
cin >> n >> q;
vector<int> lisp={0};
vector<int> lisnp={0};
for (int i=0;i<pow(2,(int)(log2(n-1)+1))-1;i++){
lisp.push_back(0);
lisnp.push_back(0);
}
int kolp=0;
int kolnp=0;
for (int i=0;i<n;i++){
int unos;
cin >> unos;
if (i%2==0){
lisp.push_back(unos);
kolnp++;
}
else {
lisnp.push_back(unos);
kolp++;
}
}
for (int i=0;i<kolp;i++){
lisp.push_back(0);
}
for (int i=0;i<kolnp;i++){
lisnp.push_back(0);
}
for (int i=0;i<pow(2,(int)(log2(n-1)+1))-n;i++){
lisp.push_back(0);
lisnp.push_back(0);
}
for (int i=pow(2,(int)(log2(n-1)+1))-1;i>0;i--){
lisp[i]=lisp[i*2]^lisp[i*2+1];
lisnp[i]=lisnp[i*2]^lisnp[i*2+1];
}
for (int i=0;i<q;i++){
//for (int j=0;j<lisp.size();j++){
// cout << lisp[j] << "\n";
//}
int vrs;
int br1;
int br2;
cin >> vrs >> br1 >> br2;
br1--;
br2--;
if (vrs==1){
br2++;
if (br1%2==0){
br1/=2;
mjenj(br1,br2,lisp);
}
else {
br1/=2;
mjenj(br1,br2,lisnp);
}
}
else{
if ((br2-br1+1)%2==0){
cout << "0\n";
continue;
}
if (br1%2==0){
br1/=2;
br2/=2;
// cout << br1 << br2 << "\n";
cout << que(br1,br2,lisp,1,1+lisp.size()/2-1,lisp.size()-1) << "\n";
}
else {
br1/=2;
br2/=2;
cout << que(br1,br2,lisnp,1,1+lisnp.size()/2-1,lisnp.size()-1) << "\n";
}
}
}
}
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