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importjava.io.*;importjava.util.*;publicclassSolution{publicstaticvoidmain(String[]args){/* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */Set<String>mySet=newHashSet<>();Scannersc=newScanner(System.in);intT=sc.nextInt();sc.nextLine();for(inti=0;i<T;i++){Stringpair=sc.nextLine();mySet.add(pair);System.out.println(mySet.size());}}}
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Java Hashset
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