diff --git a/AcWing/842/842.cpp b/AcWing/842/842.cpp
new file mode 100644
index 00000000..d6837a2f
--- /dev/null
+++ b/AcWing/842/842.cpp
@@ -0,0 +1,18 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    int n, a[10];
+    cin >> n;
+    for (int i = 0; i < n; i++) {
+        a[i] = i + 1;
+    }
+    do {
+        for (int i = 0; i < n; i++) {
+            cout << a[i] << ' ';
+        }
+        cout << endl;
+    } while (next_permutation(a, a + n));
+    return 0;
+}