diff --git a/S2OJ/1118/1118.cpp b/S2OJ/1118/1118.cpp
new file mode 100644
index 00000000..522460c8
--- /dev/null
+++ b/S2OJ/1118/1118.cpp
@@ -0,0 +1,11 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int n, l, r;
+
+int main() {
+    cin >> n >> l >> r;
+    cout << min((int)(ceil(1.0 * l / n) * n + n - 1), r) % n << endl;
+    return 0;
+}