diff --git a/homework4.txt b/homework4.txt
index d8160f0..890d72f 100644
--- a/homework4.txt
+++ b/homework4.txt
@@ -1,2 +1,6 @@
 1. What is .gitignore? You can write the answer either in Korean or English.
-2. Why do Github users need an SSH key pair? (Users can use either SSH key pair or github account info.) Please write down a brief explanation of SSH key.
\ No newline at end of file
+2. Why do Github users need an SSH key pair? (Users can use either SSH key pair or github account info.) Please write down a brief explanation of SSH key
+
+1. git에서 file 또는 directory를 관리 대상에서 제외할 때 사용하는 파일이다.
+
+2. SSH keys는 PC와 e-mail을 연결해주는 개별적인 암호이다. SSH key가 있어야 사용자들을 구분할 수 있다.
\ No newline at end of file
diff --git a/homework4/Source.cpp b/homework4/Source.cpp
index ab69b66..890741f 100644
--- a/homework4/Source.cpp
+++ b/homework4/Source.cpp
@@ -25,9 +25,15 @@ int main()
 	int* output = new int[arrsize];
 	cout << "Array output: ";
 
-	/***********************************
-	Implement the code here!
-	************************************/
+	for (int i = 0; i < arrsize; i++) {
+		while (true) {
+			output[i] = (rand() % 10);
+			if (output[i] <= arr[i]) {
+				break;
+			}
+		}
+
+	}
 
 	for (int i = 0; i < arrsize; i++) {
 		cout << output[i] << " ";