init

01-problem/Cargo.toml

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

01-problem/src/main.rs

@@ -0,0 +1,39 @@
+#![allow(unused)]
+
+use std::collections::HashMap;
+
+struct CredentialManager {
+    entries: HashMap<String, String>,
+}
+
+impl CredentialManager {
+    pub fn new() -> CredentialManager {
+        CredentialManager {
+            entries: HashMap::new(),
+        }
+    }
+
+    pub fn unlock(&self, master_secret: &str) {
+        todo!()
+    }
+
+    pub fn set(&mut self, key: &str, secret: &str) {
+        todo!()
+    }
+
+    pub fn get(&mut self, key: &str) -> Option<&str> {
+        todo!()
+    }
+
+    pub fn lock(&self) {
+        todo!()
+    }
+}
+
+fn main() {
+    let mut pw = CredentialManager::new();
+    pw.unlock("pssst");
+    pw.set("foo", "bar");
+    let val = pw.get("foo");
+    pw.lock();
+}