✨ feat(codes/rust): add leetcode_two_sum.rs

codes/rust/chapter_computational_complexity/leetcode_two_sum.rs

@@ -0,0 +1,47 @@
+/**
+ * File: leetcode_two_sum.rs
+ * Created Time: 2023-01-14
+ * Author: xBLACICEx (xBLACKICEx@outlook.com )
+*/
+
+use std::collections::HashMap;
+struct SolutionBruteForce;
+struct SolutionHashMap;
+
+impl SolutionBruteForce {
+    pub fn two_sum(nums: &Vec<i32>, target: i32) -> Vec<i32> {
+        for i in 0..nums.len() - 1 {
+            for j in i + 1..nums.len() {
+                if nums[i] + nums[j] == target {
+                    return vec![i as i32, j as i32];
+                }
+            }
+        }
+        vec![]
+    }
+}
+
+impl SolutionHashMap {
+    pub fn two_sum(nums: &Vec<i32>, target: i32) -> Vec<i32> {
+        let mut hm = HashMap::new();
+    
+        for (i, n) in nums.iter().enumerate() {
+            match hm.get(&(target - n)) {
+                Some(v) => return vec![*v as i32, i as i32],
+                None => hm.insert(n, i)
+            };
+        }
+        vec![]
+    }
+}
+
+fn main() {
+    let nums = vec![2,7,11,15];
+    let target = 9;
+
+    let res = SolutionBruteForce::two_sum(&nums, target);
+    println!("方法一 res = {:?}", res);
+
+    let res = SolutionHashMap::two_sum(&nums, target);
+    println!("方法二 res = {:?}", res);
+}