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Update the coding style for Rust and Zig (#356)

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Co-authored-by: Yudong Jin <krahets@163.com>
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sjinzh 2023-02-09 23:07:43 +08:00 committed by GitHub
parent ec25970e8e
commit 08b7474894
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2 changed files with 30 additions and 37 deletions
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48
codes/rust/chapter_computational_complexity/leetcode_two_sum.rs
View file

@ -7,53 +7,47 @@
include!("../include/include.rs");
use std::collections::HashMap;
struct SolutionBruteForce;
struct SolutionHashMap;
/* 方法一：暴力枚举 */
impl SolutionBruteForce {
pub fn two_sum(nums: &Vec<i32>, target: i32) -> Vec<i32> {
let size = nums.len();
// 两层循环，时间复杂度 O(n^2)
for i in 0..size - 1 {
for j in i + 1..size {
if nums[i] + nums[j] == target {
return vec![i as i32, j as i32];
}
pub fn two_sum_brute_force(nums: &Vec<i32>, target: i32) -> Option<Vec<i32>> {
let size = nums.len();
// 两层循环，时间复杂度 O(n^2)
for i in 0..size - 1 {
for j in i + 1..size {
if nums[i] + nums[j] == target {
return Some(vec![i as i32, j as i32]);
}
}
vec![]
}
None
}
/* 方法二：辅助哈希表 */
impl SolutionHashMap {
pub fn two_sum(nums: &Vec<i32>, target: i32) -> Vec<i32> {
// 辅助哈希表，空间复杂度 O(n)
let mut dic = HashMap::new();
// 单层循环，时间复杂度 O(n)
for (i, num) in nums.iter().enumerate() {
match dic.get(&(target - num)) {
Some(v) => return vec![*v as i32, i as i32],
None => dic.insert(num, i as i32)
};
}
vec![]
pub fn two_sum_hash_table(nums: &Vec<i32>, target: i32) -> Option<Vec<i32>> {
// 辅助哈希表，空间复杂度 O(n)
let mut dic = HashMap::new();
// 单层循环，时间复杂度 O(n)
for (i, num) in nums.iter().enumerate() {
match dic.get(&(target - num)) {
Some(v) => return Some(vec![*v as i32, i as i32]),
None => dic.insert(num, i as i32)
};
}
None
}
/* Driver Code */
fn main() {
// ======= Test Case =======
let nums = vec![ 2, 7, 11, 15 ];
let target = 9;
// ====== Driver Code ======
// 方法一
let res = SolutionBruteForce::two_sum(&nums, target);
let res = two_sum_brute_force(&nums, target).unwrap();
print!("方法一 res = ");
print_util::print_array(&res);
// 方法二
let res = SolutionHashMap::two_sum(&nums, target);
let res = two_sum_hash_table(&nums, target).unwrap();
print!("\n方法二 res = ");
print_util::print_array(&res);
}

19
codes/zig/chapter_computational_complexity/leetcode_two_sum.zig
View file

@ -6,8 +6,7 @@ const std = @import("std");
const inc = @import("include");
// 方法一：暴力枚举
pub fn twoSumBruteForce(nums: []i32, target: i32) [2]i32 {
_ = self;
pub fn twoSumBruteForce(nums: []i32, target: i32) ?[2]i32 {
var size: usize = nums.len;
var i: usize = 0;
// 两层循环，时间复杂度 O(n^2)
@ -19,12 +18,11 @@ pub fn twoSumBruteForce(nums: []i32, target: i32) [2]i32 {
}
}
}
return undefined;
return null;
}
// 方法二：辅助哈希表
pub fn twoSumHashTable(nums: []i32, target: i32) ![2]i32 {
_ = self;
pub fn twoSumHashTable(nums: []i32, target: i32) !?[2]i32 {
var size: usize = nums.len;
// 辅助哈希表，空间复杂度 O(n)
var dic = std.AutoHashMap(i32, i32).init(std.heap.page_allocator);
@ -37,21 +35,22 @@ pub fn twoSumHashTable(nums: []i32, target: i32) ![2]i32 {
}
try dic.put(nums[i], @intCast(i32, i));
}
return undefined;
return null;
}
// Driver Code
pub fn main() !void {
// ======= Test Case =======
var nums = [_]i32{ 2, 7, 11, 15 };
var target: i32 = 9;
// ====== Driver Code ======
// 方法一
twoSumBruteForce(&nums, target);
var res = twoSumBruteForce(&nums, target).?;
std.debug.print("方法一 res = ", .{});
inc.PrintUtil.printArray(i32, &res);
// 方法二
twoSumHashTable(&nums, target);
std.debug.print("方法二 res = ", .{});
res = (try twoSumHashTable(&nums, target)).?;
std.debug.print("\n方法二 res = ", .{});
inc.PrintUtil.printArray(i32, &res);
}