diff --git a/oesnuj/README.md b/oesnuj/README.md
index 586d2a4..bcb7fbd 100644
--- a/oesnuj/README.md
+++ b/oesnuj/README.md
@@ -18,4 +18,5 @@
 | 14차시 | 2024.08.05 | 해시 | [ 나는야 포켓몬 마스터 이다솜 ](https://www.acmicpc.net/problem/1620)  | [#46](https://github.com/AlgoLeadMe/AlgoLeadMe-10/pull/46) |
 | 15차시 | 2024.08.10 | 그리디 | [ 주식 ](https://www.acmicpc.net/problem/11501)  | [#47](https://github.com/AlgoLeadMe/AlgoLeadMe-10/pull/47) |
 | 16차시 | 2024.09.13 | 구현 | [ 달력 ](https://www.acmicpc.net/problem/20207)  | [#50](https://github.com/AlgoLeadMe/AlgoLeadMe-10/pull/50) |
+| 17차시 | 2024.09.21 | 구현 | [ 큰 수 A+B(2) ](https://www.acmicpc.net/problem/15353)  | [#52](https://github.com/AlgoLeadMe/AlgoLeadMe-10/pull/52) |
 ---
diff --git "a/oesnuj/\352\265\254\355\230\204/15353.cpp" "b/oesnuj/\352\265\254\355\230\204/15353.cpp"
new file mode 100644
index 0000000..c7220ff
--- /dev/null
+++ "b/oesnuj/\352\265\254\355\230\204/15353.cpp"
@@ -0,0 +1,34 @@
+#include <iostream>
+#include <string>
+#include <vector>
+
+using namespace std;
+
+string Add(string str1, string str2)
+{
+    string result = "";
+    int i = str1.size() - 1;
+    int j = str2.size() - 1;
+    int carry = 0;
+    while (i >= 0 || j >= 0 || carry > 0)
+    {
+        int num1 = 0, num2 = 0;
+        if (i >= 0)
+            num1 = str1[i--] - '0';
+        if (j >= 0)
+            num2 = str2[j--] - '0';
+
+        int sum = num1 + num2 + carry;
+        carry = sum / 10;
+        result = to_string(sum % 10) + result;
+    }
+    return result;
+}
+
+int main()
+{
+    string a, b;
+    cin >> a >> b;
+    cout << Add(a, b);
+    return 0;
+}
\ No newline at end of file