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May 24th, 2015
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  1. void find_pair(int a[], int n, int K){
  2. map <int, int> hash;
  3. int i;
  4. for(i=0; i<n; i++){
  5. hash[i] = -1;
  6. }
  7. for(i=0; i<n; i++){
  8. int val = K + a[i];
  9. if(hash[a[i]] != -1){
  10. cout <<hash[a[i]] <<" "<< i;
  11. return;
  12. }
  13. hash[val] = i;
  14. }
  15. }
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