diff --git a/AcWing/89/89.cpp b/AcWing/89/89.cpp
new file mode 100644
index 00000000..4ffb6f89
--- /dev/null
+++ b/AcWing/89/89.cpp
@@ -0,0 +1,17 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+long long a, b, p, ans = 1;
+
+int main() {
+    cin >> a >> b >> p;
+    a %= p;
+    while (b) {
+        if (b & 1) ans = ans * a % p;
+        a = a * a % p;
+        b >>= 1;
+    }
+    cout << ans % p << endl;
+    return 0;
+}