diff --git a/Program.cs b/Program.cs
index 00101f7..0ed7c5b 100644
--- a/Program.cs
+++ b/Program.cs
@@ -5,9 +5,12 @@ class Program
     static void Main(string[] args)
     {
         //dichiarazione e inizializzazione variabili
-        int scelta, i, numero, somma;
+        int scelta, i, numero, somma, tmp;
         somma = 0;
-        bool positiviPari = true;
+        tmp = 0;
+        bool positiviPari, positivoNegativo;
+        positiviPari = true;
+        positivoNegativo = false;
         //menu
         do {
             Console.WriteLine("Scegliere un'opzione:");
@@ -23,6 +26,7 @@ class Program
                 case 0:
                     break;
                 case 1:
+                    positiviPari = true;
                     do{
                         Console.Write("Numeri da inserire: ");
                         i = Convert.ToInt32(Console.ReadLine());
@@ -34,7 +38,7 @@ class Program
                     for (; i > 0; i--){
                         Console.Write("Inserire un numero: ");
                         numero = Convert.ToInt32(Console.ReadLine());
-                        if(numero < 0 || numero % 2 != 0){
+                        if(numero < 0 || numero % 2 != 0){ //se non è positivo e pari
                             positiviPari = false;
                         }
                     }
@@ -46,10 +50,11 @@ class Program
                     }
                     break;
                 case 2:
+                    somma = 0;
                     do{
                         Console.Write("Inserire un numero: ");
                         numero = Convert.ToInt32(Console.ReadLine());
-                        if (!((numero < 0 && numero % 2 == 0) || (numero >= 0 && numero % 3 == 0))){
+                        if (!((numero < 0 && numero % 2 == 0) || (numero >= 0 && numero % 3 == 0))){ //se non è ((minore di zero e divisibile per 2) o è ((maggiore o uguale a zero) e divisibile per 3))
                             somma = somma + numero;
                         }
                     }
@@ -57,7 +62,23 @@ class Program
                     Console.WriteLine("Somma: " + somma);
                     break;
                 case 3:
-                break;
+                    positivoNegativo = false;
+                    do{
+                        Console.Write("Inserire un numero: ");
+                        numero = Convert.ToInt32(Console.ReadLine());
+                        if(numero > 0 && tmp < 0){
+                            positivoNegativo = true;
+                        }
+                        tmp = numero;
+                    }
+                    while (numero != 0);
+                    if(positivoNegativo){
+                        Console.WriteLine("OK");
+                    }
+                    else{
+                        Console.WriteLine("NO");
+                    }
+                    break;
                 case 4:
                 break;
                 default:
diff --git a/bin/Debug/net9.0/ripasso1.dll b/bin/Debug/net9.0/ripasso1.dll
index e479168..c3eb841 100644
Binary files a/bin/Debug/net9.0/ripasso1.dll and b/bin/Debug/net9.0/ripasso1.dll differ
diff --git a/bin/Debug/net9.0/ripasso1.pdb b/bin/Debug/net9.0/ripasso1.pdb
index 5800ae7..2cfb8ca 100644
Binary files a/bin/Debug/net9.0/ripasso1.pdb and b/bin/Debug/net9.0/ripasso1.pdb differ
diff --git a/obj/Debug/net9.0/ref/ripasso1.dll b/obj/Debug/net9.0/ref/ripasso1.dll
index 383a780..8dcb25c 100644
Binary files a/obj/Debug/net9.0/ref/ripasso1.dll and b/obj/Debug/net9.0/ref/ripasso1.dll differ
diff --git a/obj/Debug/net9.0/refint/ripasso1.dll b/obj/Debug/net9.0/refint/ripasso1.dll
index 383a780..8dcb25c 100644
Binary files a/obj/Debug/net9.0/refint/ripasso1.dll and b/obj/Debug/net9.0/refint/ripasso1.dll differ
diff --git a/obj/Debug/net9.0/ripasso1.AssemblyInfo.cs b/obj/Debug/net9.0/ripasso1.AssemblyInfo.cs
index d082391..1f824c7 100644
--- a/obj/Debug/net9.0/ripasso1.AssemblyInfo.cs
+++ b/obj/Debug/net9.0/ripasso1.AssemblyInfo.cs
@@ -13,7 +13,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("ripasso1")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+e1c4d5e33e3928d02e8d2d8c5dad601ee6a069b7")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+018f63991bf194f27f28e5f478eb7c5a8784aa89")]
 [assembly: System.Reflection.AssemblyProductAttribute("ripasso1")]
 [assembly: System.Reflection.AssemblyTitleAttribute("ripasso1")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
diff --git a/obj/Debug/net9.0/ripasso1.AssemblyInfoInputs.cache b/obj/Debug/net9.0/ripasso1.AssemblyInfoInputs.cache
index 076d1cd..14564c8 100644
--- a/obj/Debug/net9.0/ripasso1.AssemblyInfoInputs.cache
+++ b/obj/Debug/net9.0/ripasso1.AssemblyInfoInputs.cache
@@ -1 +1 @@
-f2c5cde86cd7c9aecef2ceb3af53f8d967d88c13fffb33996563a5258c59d278
+042eecfbc24d3d06289088724a32fc5b4299d5aefd8aabe9fff63f62e1ef4676
diff --git a/obj/Debug/net9.0/ripasso1.dll b/obj/Debug/net9.0/ripasso1.dll
index e479168..c3eb841 100644
Binary files a/obj/Debug/net9.0/ripasso1.dll and b/obj/Debug/net9.0/ripasso1.dll differ
diff --git a/obj/Debug/net9.0/ripasso1.pdb b/obj/Debug/net9.0/ripasso1.pdb
index 5800ae7..2cfb8ca 100644
Binary files a/obj/Debug/net9.0/ripasso1.pdb and b/obj/Debug/net9.0/ripasso1.pdb differ