diff --git a/.idea/misc.xml b/.idea/misc.xml
index d15472f..045943f 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_18" default="true" project-jdk-name="openjdk-18" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_20" default="true" project-jdk-name="openjdk-18" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/src/MyMath.java b/src/MyMath.java
index 7da9a29..7b36066 100644
--- a/src/MyMath.java
+++ b/src/MyMath.java
@@ -1,7 +1,16 @@
-import java.util.Scanner;
 
 public class MyMath {
+    public static int gcf(int a, int b){
+        while (b!=0){
+            if (a>b){
+                int c = b;
+                b = a%b;
+                a = c;
+            }
+          else{  b = b%a;}
+        } return a;
+    }
 
     public static void main(String[] args) {
-    }
+        System.out.println(gcf(78345,369 ));  }
 }