diff --git a/build.gradle b/build.gradle
index f4ad580..123fd3c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,13 +3,13 @@ plugins {
 }
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
 }
 
 kotlin {
     jvmToolchain {
-        languageVersion = JavaLanguageVersion.of(17)
+        languageVersion = JavaLanguageVersion.of(21)
     }
 }
 
@@ -27,4 +27,5 @@ repositories {
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib"
     implementation 'org.junit.jupiter:junit-jupiter:5.8.1'
+
 }
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/homework/fizzbuzz.kt b/src/main/kotlin/ru/otus/homework/fizzbuzz.kt
index 6e04be1..04d465e 100644
--- a/src/main/kotlin/ru/otus/homework/fizzbuzz.kt
+++ b/src/main/kotlin/ru/otus/homework/fizzbuzz.kt
@@ -2,5 +2,18 @@ package ru.otus.homework
 
 
 fun fizzbuzz(n: Int): Array<String> {
-    TODO("Выполните задание")
+    val result: Array<String> = Array(n) { "" }
+
+    for (i in 0..<n) result[i] =
+        if (i == 0 || i % 15 == 0) {
+            "FizzBuzz"
+        } else if (i % 5 == 0) {
+            "Buzz"
+        } else if (i % 3 == 0) {
+            "Fizz"
+        } else {
+            i.toString()
+        }
+
+    return result
 }
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/homework/sumoftwo.kt b/src/main/kotlin/ru/otus/homework/sumoftwo.kt
index 70d72e5..f9cb197 100644
--- a/src/main/kotlin/ru/otus/homework/sumoftwo.kt
+++ b/src/main/kotlin/ru/otus/homework/sumoftwo.kt
@@ -2,5 +2,10 @@ package ru.otus.homework
 
 
 fun sumOfTwo(numbers: IntArray, target: Int): IntArray {
-    TODO("Выполните задание")
+    for (i in 0 until numbers.size - 1)
+        for (j in i + 1 until numbers.size)
+            if (numbers[i] + numbers[j] == target)
+                return intArrayOf(i, j)
+
+    throw IllegalArgumentException()
 }
\ No newline at end of file