diff --git a/sitou/src/B117_drivingschool.java b/sitou/src/B117_drivingschool.java
new file mode 100644
index 0000000000000000000000000000000000000000..5b6f2bd8abcc86f5cc64fe8b4df1ad67d7c1e53f
--- /dev/null
+++ b/sitou/src/B117_drivingschool.java
@@ -0,0 +1,28 @@
+package src;
+
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class B117_drivingschool {
+  public static void main(String[] args) {
+    final Scanner sc = new Scanner(System.in);
+    final int howmanyCars = sc.nextInt();
+    ArrayList<Integer> carsList = new ArrayList<>();
+
+    for(int i = 0; i < howmanyCars; i++){
+      carsList.add(sc.nextInt());
+    }
+
+    int roundCount = 0;
+    int outCarsNo = 1;
+    while(outCarsNo < howmanyCars) {
+      for(int cuurentCarsNo : carsList) {
+        if(currentCarsList == outCarsNo) outCarsNo++;
+      }
+      if(outCarsNo <= howmanyCars) roundCount++;
+    }
+
+    System.out.println(roundCount);
+    sc.close();
+  }
+}