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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Ideone {
  6.  
  7. 	public interface Pair<K, V> {
  8. 	}
  9.  
  10. 	public abstract class AbstractCollection<E> {
  11. 		protected abstract int append(E element);
  12. 	}
  13.  
  14. 	public abstract class AbstractMap<K, V> extends AbstractCollection<Pair<K, V>> {
  15.  
  16. 		@Override
  17. 		public int append(Pair<K, V> element) {
  18. 			return 0;
  19. 		}
  20.  
  21. 	}
  22.  
  23. 	public static void main(String[] args) {
  24. 	}
  25.  
  26. }
Success #stdin #stdout 0.07s 380160KB
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https://ideone.com/vMamgs
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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