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class Solution {
public:
int xorOperation(int n, int start) {
vector<int>v;
for(int i=start;v.size()!=n;i=i+2){
v.push_back(i);
}
int ans=v[0];
for(int i=1;i<v.size();i++){
ans=ans^v[i];
}
return ans;
}
};