diff --git a/Alberi1/.gitignore b/Alberi1/.gitignore
new file mode 100644
index 0000000..13275f1
--- /dev/null
+++ b/Alberi1/.gitignore
@@ -0,0 +1,30 @@
+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+.kotlin
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
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diff --git a/Alberi1/.idea/.gitignore b/Alberi1/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/Alberi1/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/Alberi1/.idea/misc.xml b/Alberi1/.idea/misc.xml
new file mode 100644
index 0000000..07115cd
--- /dev/null
+++ b/Alberi1/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Alberi1/.idea/modules.xml b/Alberi1/.idea/modules.xml
new file mode 100644
index 0000000..520e7b8
--- /dev/null
+++ b/Alberi1/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/Alberi1.iml" filepath="$PROJECT_DIR$/Alberi1.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/Alberi1/.idea/vcs.xml b/Alberi1/.idea/vcs.xml
new file mode 100644
index 0000000..6c0b863
--- /dev/null
+++ b/Alberi1/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Alberi1/Alberi1.iml b/Alberi1/Alberi1.iml
new file mode 100644
index 0000000..c90834f
--- /dev/null
+++ b/Alberi1/Alberi1.iml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/Alberi1/src/NodoMain.java b/Alberi1/src/NodoMain.java
new file mode 100644
index 0000000..631bd37
--- /dev/null
+++ b/Alberi1/src/NodoMain.java
@@ -0,0 +1,84 @@
+class Nodo{
+    int dato;
+    Nodo left, right;
+
+    public Nodo(int dato, Nodo left, Nodo right) {
+        this.dato = dato;
+        this.left = left;
+        this.right = right;
+    }
+
+    static void stampa(Nodo n, int livello, String lr) {
+        if(n==null) return;
+        for(int i=0;i<livello-1;i++)
+            System.out.print("\t");
+        if(livello!=0) System.out.print("+------->");
+        System.out.println(n.dato+lr);
+        stampa(n.left, livello+1,"L");
+        stampa(n.right, livello+1,"R");
+    }
+
+   /*
+    0) fissate l'intestazione della funzione e
+    pensate che esista già e che funzioni
+    1) caso base, trovare un caso in cui la risposta
+       è ovvia e non serve computazione
+    2) cosa fare col dato attuale e cosa fare con i rimanenti
+
+    */
+
+    static int somma(Nodo albero) {
+        if(albero==null) return 0;
+        return albero.dato+somma(albero.left)+somma(albero.right);
+    }
+
+    static int conta(Nodo albero) {//conta quanti sono i nodi
+        if(albero==null) return 0;
+        return 1+conta(albero.left)+conta(albero.right);
+    }
+
+    static int contaFoglie(Nodo albero) {//conta quanti sono le foglie (nodi senza figli)
+        if(albero==null) return 0;
+        if (albero.left == null && albero.right == null) {
+            return 1;
+        } else {
+            return contaFoglie(albero.left) + contaFoglie(albero.right);
+        }
+    }
+
+    static Nodo insOrd(int val, Nodo albero) {
+        if(albero==null) return new Nodo(val, null, null);
+        if(val>albero.dato) return
+                new Nodo(albero.dato, albero.left, insOrd(val, albero.right));
+        return new Nodo(albero.dato, insOrd(val, albero.left), albero.right);
+    }
+    static boolean trova(Nodo albero, int valore) {
+        if(albero==null) return false;
+        else if(albero.dato==valore) return true;
+        else return trova(albero.left, valore) || trova(albero.right, valore);
+    }
+}
+
+
+
+public class NodoMain {
+    public static void main(String[] args) {
+        Nodo n1 = new Nodo(10, null, null);
+        Nodo n2 = new Nodo(5, null, null);
+        Nodo n3 = new Nodo(30, null, null);
+
+        n1.left = n2;
+        n1.right = n3;
+
+//        Nodo.stampa(n1,0);
+
+        Nodo n4 = Nodo.insOrd(23, n1);
+        n4 = Nodo.insOrd(1, n4);
+        Nodo.stampa(n4,0,"");
+        System.out.println("Nodi: " + Nodo.conta(n4));
+        System.out.println("Foglie: " + Nodo.contaFoglie(n4));
+        System.out.println("Somma: " + Nodo.somma(n4));
+        System.out.println("Trovato 24? " + Nodo.trova(n4,24));
+    }
+
+}
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