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Create 2425. Bitwise XOR of All Pairings #690

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Jan 16, 2025
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Create 2425. Bitwise XOR of All Pairings #690

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14 changes: 14 additions & 0 deletions 2425. Bitwise XOR of All Pairings
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Original file line number Diff line number Diff line change
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class Solution {
public:
int xorAllNums(vector<int>& nums1, vector<int>& nums2) {
int n1=nums1.size(), n2=nums2.size();
unordered_map<int,long>freq;
for(int n:nums1) freq[n]+=n2;
for(int n:nums2) freq[n]+=n1;
int res=0;
for(auto& [n,c]:freq){
if(c%2==1) res^=n;
}
return res;
}
};
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