feat: add initial implementation of power of four solution with main function

342_power_of_four/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "power_of_four"
+version = "0.1.0"

342_power_of_four/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "power_of_four"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

342_power_of_four/src/main.rs

@@ -0,0 +1,25 @@
+fn main() {
+    println!("Hello, world!");
+}
+
+struct Solution;
+
+impl Solution {
+    pub fn is_power_of_four(mut n: i32) -> bool {
+        if n <= 0 {
+            return false;
+        }
+
+        while n > 0 {
+            if n == 1 {
+                return true
+            }
+            if n % 4 != 0 {
+                return false;
+            }
+            n /= 4;
+        }
+
+        false
+    }
+}