import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.util.TreeMap; public class Main { public static void main(String[] args) throws NumberFormatException, IOException { BufferedReader sc=new BufferedReader(new InputStreamReader(System.in)); PrintWriter out=new PrintWriter(new OutputStreamWriter(System.out)); TreeMap<Integer,Integer>arr=new TreeMap<>(); int n=Integer.parseInt(sc.readLine()); for (int i = 0; i < n; i++) { int a=Integer.parseInt(sc.readLine()); if(arr.containsKey(a))arr.put(a, arr.get(a)+1); else arr.put(a, 1); } for (Integer k:arr.keySet()) { out.println(k+" "+arr.get(k)); } out.flush(); } }
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