update

leetcode_rs/problems/p383/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "p383"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

leetcode_rs/problems/p383/src/main.rs

@@ -0,0 +1,44 @@
+struct Solution;
+
+impl Solution {
+    pub fn can_construct(ransom_note: String, magazine: String) -> bool {
+        // 提前判断
+        if ransom_note.len() > magazine.len() {
+            return false;
+        }
+
+        let mut char_counts = [0; 128];
+
+        // 统计magazine中每个字符的出现次数
+        for &b in magazine.as_bytes() {
+            char_counts[b as usize] += 1;
+        }
+
+        // 减去ransom_note中的字符
+        for &b in ransom_note.as_bytes() {
+            char_counts[b as usize] -= 1;
+            if char_counts[b as usize] < 0 {
+                return false;
+            }
+        }
+
+        true
+    }
+}
+
+fn main() {
+    let test_cases = [
+        ("a", "b", false),
+        ("aa", "ab", false),
+        ("aa", "aab", true),
+        ("", "", true),
+    ];
+
+    for (note, mag, expected) in test_cases {
+        let result = Solution::can_construct(note.to_string(), mag.to_string());
+        println!(
+            "Can \"{}\" be constructed from \"{}\"? {} (Expected: {})",
+            note, mag, result, expected
+        );
+    }
+}