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Oct 20th, 2018
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  1. int Solution::singleNumber(const vector<int> &A)
  2. {
  3. int a=0;
  4. int b=0;
  5. int c,d;
  6. for(int i=0;i<A.size();i++)
  7. {
  8. a=a^A[i];
  9. c=~b;
  10. a=a&c;
  11. b=b^A[i];
  12. d=~a;
  13. b=b&d;
  14. }
  15. return a;
  16. }
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