diff --git a/13lanqiao/test3.cpp b/13lanqiao/test3.cpp
new file mode 100644
index 0000000..271a812
--- /dev/null
+++ b/13lanqiao/test3.cpp
@@ -0,0 +1,21 @@
+// lanqiao 2098 刷题统计(枚举法)
+#include<bits/stdc++.h>
+using namespace std;
+#define int long long
+signed main(){
+    int a, b, n; cin >> a >> b >> n;
+    int sum = 0, i;
+    for(i = 1; ;i++){
+        if(i % 7 != 0 && i % 7 != 6){
+            sum += a;
+        }else{
+            sum += b;
+        }
+        if(sum >= n) break;
+    }
+    cout << i << endl;
+    return 0;
+}
+/* test samples -> 8
+10 20 99
+*/
\ No newline at end of file