diff --git a/lab104/src/.idea/.gitignore b/lab104/src/.idea/.gitignore
new file mode 100644
index 0000000..26d3352
--- /dev/null
+++ b/lab104/src/.idea/.gitignore
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/lab104/src/.idea/misc.xml b/lab104/src/.idea/misc.xml
new file mode 100644
index 0000000..e6be3f1
--- /dev/null
+++ b/lab104/src/.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="corretto-17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/lab104/src/.idea/modules.xml b/lab104/src/.idea/modules.xml
new file mode 100644
index 0000000..add5563
--- /dev/null
+++ b/lab104/src/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/lab104.iml" filepath="$PROJECT_DIR$/lab104.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/lab104/src/.idea/vcs.xml b/lab104/src/.idea/vcs.xml
new file mode 100644
index 0000000..fdf1fc8
--- /dev/null
+++ b/lab104/src/.idea/vcs.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/lab104/src/Main.java b/lab104/src/Main.java
new file mode 100644
index 0000000..9eae2ab
--- /dev/null
+++ b/lab104/src/Main.java
@@ -0,0 +1,68 @@
+import javax.crypto.spec.PSource;
+import java.util.Arrays;
+
+public class Main {
+    public static void main(String[] args) {
+
+        int [] arrayNumbers = {10, 63, 74, 8, 2};
+
+        ///  TASK 1
+        int result = calculateDifference(arrayNumbers);
+        System.out.println("The difference between the largest and smallest values is " + result);
+
+        /// TASK 2
+        findNumbers(arrayNumbers);
+
+        /// TASK 3
+        double x = 2;
+        double y = 4;
+
+        double expressionResult = calculate(x, y);
+        System.out.println("Expression result: "+ expressionResult);
+    }
+
+    public static int calculateDifference(int[] arrayNumbers){
+
+        int maxValue = arrayNumbers[0];
+        int minValue = arrayNumbers[0];
+
+        for (int i = 1; i < arrayNumbers.length; i++) {
+            if (arrayNumbers[i] > maxValue) {
+                maxValue = arrayNumbers[i];
+            }
+            else if (arrayNumbers[i] < minValue) {
+                minValue = arrayNumbers[i];
+            }
+        }
+
+        return maxValue - minValue;
+
+    }
+
+    public static void findNumbers(int[] arrayNumbers) {
+
+        int smallest = arrayNumbers[0];
+        int secondSmallest = arrayNumbers[0];
+
+        for (int j = 1; j < arrayNumbers.length; j++) {
+            if (arrayNumbers[j] < smallest) {
+                secondSmallest = smallest;
+                smallest = arrayNumbers[j];
+            }
+            else if (arrayNumbers[j] < secondSmallest) {
+                secondSmallest = arrayNumbers[j];
+            }
+        }
+
+        System.out.println("The smallest and second smallest numbers of the array are: " + smallest +" y "+ secondSmallest);
+
+    }
+
+    public static double calculate(double x, double y) {
+        double outParenthesis = Math.pow(x, 2);
+        double inParenthesis = Math.pow((4*y/5-x), 2);
+
+        return outParenthesis + inParenthesis;
+
+    }
+}
\ No newline at end of file
diff --git a/lab104/src/lab104.iml b/lab104/src/lab104.iml
new file mode 100644
index 0000000..b107a2d
--- /dev/null
+++ b/lab104/src/lab104.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://$MODULE_DIR$" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file