first commit

2022-12-15 23:51:04 +07:00
commit 87d51fb251
292 changed files with 12623 additions and 0 deletions
@@ -0,0 +1,26 @@
+import java.util.*;
+import java.io.*;
+
+public class Main{
+    public static void main(String[] args) throws IOException, ClassNotFoundException{
+        boolean[] f = new boolean[100005];
+        for(int i=2; i<f.length; i++) f[i]=true;
+        for(int i=2; i<=(int)Math.sqrt(f.length); i++){
+            if(f[i]){
+                for(int u=i; u<=100000/i; u++) f[i*u]=false;
+            }
+        }
+        ObjectInputStream ois = new ObjectInputStream(new FileInputStream("SONGUYEN.in"));
+        ArrayList<Integer> a = (ArrayList<Integer>) ois.readObject();
+        TreeMap<Integer, Integer> hm = new TreeMap<>();
+        a.forEach(e ->{
+            if(f[e]){
+                if(hm.get(e) == null) hm.put(e, 1);
+                else hm.put(e, hm.get(e)+1);
+            }
+        });
+        hm.forEach((k, v) -> {
+            System.out.println(k + " " + v);
+        });
+    }
+}