diff --git a/yuyu0830/README.md b/yuyu0830/README.md
index b957bf0..c6d506a 100644
--- a/yuyu0830/README.md
+++ b/yuyu0830/README.md
@@ -6,4 +6,8 @@
 | 2차시 | 2024.03.15 |  탐색  | [숨바꼭질 2](https://www.acmicpc.net/problem/12851)  | - |
 | 3차시 | 2024.03.20 |  탐색  | [하이퍼 토마토](https://www.acmicpc.net/problem/17114)  | - |
 | 4차시 | 2024.03.26 |  분할정복  | [행렬 제곱](https://www.acmicpc.net/problem/10830)  | - |
+| 5차시 | 2024.03.29 |  탐색  | [스도쿠](https://www.acmicpc.net/problem/2239)  | - |
+| 6차시 | 2024.04.03 |  자료구조  | [나만 안되는 연애](https://www.acmicpc.net/problem/14621)  | - |
+| 7차시 | 2024.04.04 |  저울  | [저울](https://www.acmicpc.net/problem/2437)  | - |
+
 ---
diff --git "a/yuyu0830/\354\210\230\355\225\231/2437.cpp" "b/yuyu0830/\354\210\230\355\225\231/2437.cpp"
new file mode 100644
index 0000000..cfba534
--- /dev/null
+++ "b/yuyu0830/\354\210\230\355\225\231/2437.cpp"
@@ -0,0 +1,34 @@
+#include <iostream>
+#include <queue>
+
+using namespace std;
+
+int main() {
+    priority_queue<int, vector<int>, greater<int> > q;
+    int n; cin >> n;
+    
+    for (int i = 0; i < n; i++) {
+        int t; cin >> t;
+        q.push(t);
+    }
+
+    bool first = true;
+    int max = 1;
+
+    while (!q.empty()) {
+        int t = q.top();
+        q.pop();
+
+        // when First number isn't 1
+        if (first && t != 1) 
+            break;
+
+        first = false;
+        
+        // can search more?
+        if (t <= max) max += t;
+        else break;
+    }
+
+    printf("%d\n", max);
+}
\ No newline at end of file