feat: 771_jewels_and_stones

771_jewels_and_stones/Cargo.lock

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

771_jewels_and_stones/Cargo.toml

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+[package]
+name = "jewels_and_stones"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

771_jewels_and_stones/src/lib.rs

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+use std::collections::HashSet;
+
+pub struct Solution;
+
+impl Solution {
+    pub fn num_jewels_in_stones(jewels: String, stones: String) -> i32 {
+        let jewels: HashSet<char> = HashSet::from_iter(jewels.chars());
+        let mut result = 0;
+
+        for stone in stones.chars() {
+            if jewels.contains(&stone) {
+                result += 1;
+            }
+        }
+
+        result
+    }
+}