diff --git a/src/week2/BOJ17298/BOJ17298_V1.cpp b/src/week2/BOJ17298/BOJ17298_V1.cpp
new file mode 100644
index 0000000..e07ab0b
--- /dev/null
+++ b/src/week2/BOJ17298/BOJ17298_V1.cpp
@@ -0,0 +1,54 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+int main() {
+
+    int N;
+    cin >> N;
+
+    vector<int> arr(N);
+    vector<pair<int, int>> ret(N);
+
+    for (int i = 0; i < N; i++) {
+        cin >> arr[i];
+    }
+
+    ret[N-1] = {arr[N-1],-1};
+    for (int i=N-2; i>=0; i--) {
+        if (arr[i] < arr[i+1]) {
+            ret[i].first = arr[i+1];
+            ret[i].second = i+1;
+        } else if (ret[i+1].second == -1) {
+            ret[i].first = arr[i];
+            ret[i].second = -1;
+        } else {
+            int temp_num = i+1;
+            while(true) {
+                if (temp_num == -1) {
+                    ret[i].first = arr[i];
+                    ret[i].second = temp_num;
+                    break;
+                }
+
+                if (ret[temp_num].first > arr[i]) {
+                    ret[i].first = ret[temp_num].first;
+                    ret[i].second = ret[temp_num].second;
+                    break;
+                } else {
+                    temp_num = ret[temp_num].second;
+                }
+            }
+        }
+    }
+
+    for (int i = 0; i < N; i++) {
+        if (ret[i].second == -1) {
+            cout << -1 << " ";
+        } else {
+            cout << ret[i].first << " ";
+        }
+    }
+
+
+    return 0;
+}
\ No newline at end of file
diff --git a/src/week2/BOJ17298/BOJ17298_V2.cpp b/src/week2/BOJ17298/BOJ17298_V2.cpp
new file mode 100644
index 0000000..cd9c5d3
--- /dev/null
+++ b/src/week2/BOJ17298/BOJ17298_V2.cpp
@@ -0,0 +1,30 @@
+#include <bits/stdc++.h>
+using namespace std;
+int N;
+
+int main() {
+
+    cin >> N;
+    vector<int> arr = vector<int>(N,0);
+    vector<int> ret = vector<int>(N,-1);
+    stack<int> stk;
+
+    for (int i = 0; i < N; i++) {
+        cin >> arr[i];
+        while (stk.size() && arr[stk.top()] < arr[i]) {
+            ret[stk.top()] = arr[i];
+            stk.pop();
+        }
+        stk.push(i);
+    }
+
+    for (int i : ret) {
+        cout << i << " ";
+    }
+
+
+
+
+
+    return 0;
+}
\ No newline at end of file