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krahets 2024-01-13 10:12:53 +08:00
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docs/chapter_searching/binary_search_insertion.md
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@ -227,8 +227,8 @@ comments: true
=== "Rust" === "Rust"
```rust title="binary_search_insertion.rs" ```rust title="binary_search_insertion.rs"
/* 二分查找插入点（存在重复元素） */ /* 二分查找插入点（无重复元素） */
pub fn binary_search_insertion(nums: &[i32], target: i32) -> i32 { fn binary_search_insertion_simple(nums: &[i32], target: i32) -> i32 {
let (mut i, mut j) = (0, nums.len() as i32 - 1); // 初始化双闭区间 [0, n-1] let (mut i, mut j) = (0, nums.len() as i32 - 1); // 初始化双闭区间 [0, n-1]
while i <= j { while i <= j {
let m = i + (j - i) / 2; // 计算中点索引 m let m = i + (j - i) / 2; // 计算中点索引 m
@ -237,10 +237,10 @@ comments: true
} else if nums[m as usize] > target { } else if nums[m as usize] > target {
j = m - 1; // target 在区间 [i, m-1] 中 j = m - 1; // target 在区间 [i, m-1] 中
} else { } else {
j = m - 1; // 首个小于 target 的元素在区间 [i, m-1] 中 return m;
} }
} }
// 返回插入点 i // 未找到 target ，返回插入点 i
i i
} }
``` ```