Normalize mid calculate in case overflow

codes/rust/chapter_divide_and_conquer/binary_search_recur.rs

@@ -10,7 +10,7 @@ fn dfs(nums: &[i32], target: i32, i: i32, j: i32) -> i32 {
     if i > j {
         return -1;
     }
-    let m: i32 = (i + j) / 2;
+    let m: i32 = i + (j - i) / 2;
     if nums[m as usize] < target {
         // 递归子问题 f(m+1, j)
         return dfs(nums, target, m + 1, j);

codes/rust/chapter_sorting/radix_sort.rs

@@ -35,9 +35,7 @@ fn counting_sort_digit(nums: &mut [i32], exp: i32) {
         counter[d] -= 1; // 将 d 的数量减 1
     }
     // 使用结果覆盖原数组 nums
-    for i in 0..n {
-        nums[i] = res[i];
-    }
+    nums.copy_from_slice(&res);
 }
 
 /* 基数排序 */