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Korotkodul

Лазерная пушка

Dec 14th, 2021
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  1. #include <iostream>
  2. #include <cmath>
  3. #include <vector>
  4. #include <queue>
  5. #include <algorithm>
  6. #include <string>
  7. #include <stack>
  8. #include <set>
  9. #include <map>
  10. #define pii pair <int,int>
  11. using namespace std;
  12. using ll = long long;
  13. void cv(vector <int> &v){
  14. for (auto x: v) cout<<x<<' ';
  15. cout<<"\n\n";
  16. }
  17.  
  18. int main()
  19. {
  20. /*ios::sync_with_stdio(0);
  21. cin.tie(0);
  22. cout.tie(0);*/
  23. int x,y;
  24. cin>>x>>y;
  25. if (abs(x+y) % 2 != 0){
  26. cout<<-1;
  27. exit(0);
  28. }
  29. if (x == y && x > 0){
  30. cout<<0;
  31. exit(0);
  32. }
  33. }
  34.  
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