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⚡ Update #587

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Dec 13, 2023
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⚡ Update #587

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212 changes: 189 additions & 23 deletions content/blog/LearningRustThoughKyouPro/Ex1/index.md
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@ published: true

タイトルのまんまです。アルゴリズムやデータ構造ごとに、そのアルゴリズムを使って解けそうな問題をリストアップします。基本的に私が解いた問題から載せていくので、最初の内は簡単なものばかりで数も少ないです。

都合上、同じ問題が何度も登場することがありますがご了承ください🙇‍♂️。
都合上、同じ問題が複数回登場することがありますがご了承ください🙇‍♂️。

# アルゴリズム

Expand Down Expand Up @@ -60,11 +60,12 @@ mod tests {
}
}
```

</details>

## bit全探索

[bit 全探索 - けんちょんの競プロ精進記録](https://drken1215.hatenablog.com/entry/2019/12/14/171657)

### ARC105 A - Fourtune Cookies

[A - Fourtune Cookies](9https://atcoder.jp/contests/arc105/tasks/arc105_a)（<span style="color: gray">🧪 Difficulty : 34</span>）
Expand Down Expand Up @@ -116,9 +117,7 @@ mod tests {
assert_eq!(String::from("No"), run(93407609, 30427494, 56229544, 81174201));
}
}

```

</details>

### ARC025 A - ゴールドラッシュ
Expand Down Expand Up @@ -164,7 +163,6 @@ mod tests {
}
}
```

</details>

### ABC182 C - To 3
Expand Down Expand Up @@ -226,7 +224,6 @@ mod tests {
}
}
```

</details>

### ABC079 C - Train Ticket
Expand Down Expand Up @@ -287,7 +284,6 @@ mod tests {

[B - Hard Calculation](https://atcoder.jp/contests/abc229/tasks/abc229_b)（<span style="color: gray">Difficulty : 42</span>）


<details>
<summary>コード例を見る</summary>

Expand Down Expand Up @@ -329,7 +325,6 @@ mod tests {

[B - Slimes](https://atcoder.jp/contests/abc248/tasks/abc248_b)（<span style="color: gray">Difficulty : 41</span>）


<details>
<summary>コード例を見る</summary>

Expand Down Expand Up @@ -363,9 +358,195 @@ mod tests {
assert_eq!(29, run(1, 536870912, 2));
}
}
```
</details>

### ABC083 C - Multiple Gift

[C - Multiple Gift](https://atcoder.jp/contests/abc083/tasks/arc088_a)（<span style="color: gray">Difficulty : 392</span>）

<details>
<summary>コード例を見る</summary>

```rust
// https://atcoder.jp/contests/abc083/tasks/arc088_a

fn calc(n: usize, y: usize, count: usize) -> usize {
if n > y {
count
} else {
calc(n*2, y, count+1)
}
}

pub fn run(x: usize, y: usize) -> usize {
calc(x, y, 0)
}

#[cfg(test)]
mod tests {
use super::*;

#[test]
fn test() {
assert_eq!(3, run(3, 20));
assert_eq!(3, run(25, 100));
assert_eq!(31, run(314159265, 358979323846264338));
}
}
```
</details>

## ユークリッドの互除法

[AtCoder 版！マスター・オブ・整数 (最大公約数編)](https://qiita.com/drken/items/0c88a37eec520f82b788)

### アルゴリズムと数学　演習問題集 015 - Calculate GCD

[015 - Calculate GCD](https://atcoder.jp/contests/math-and-algorithm/tasks/math_and_algorithm_o)

<details>
<summary>コード例を見る</summary>

```rust
// https://atcoder.jp/contests/math-and-algorithm/tasks/math_and_algorithm_o

fn gcd(a: usize, b: usize) -> usize {
if b == 0 {
a
} else {
gcd(b, a % b)
}
}

pub fn run(a: usize, b: usize) -> usize {
gcd(a, b)
}


fn main() {
println!("{}", run(33, 88));
println!("{}", run(123, 777));
}
```
</details>

### ARC105 B - MAX-=min

[B - MAX-=min](https://atcoder.jp/contests/arc105/tasks/arc105_b)（<span style="color: gray">Difficulty : 366</span>）

<details>
<summary>コード例を見る</summary>

```rust
// https://atcoder.jp/contests/arc105/tasks/arc105_b

fn gcd(a: usize, b: usize) -> usize {
if b == 0 {
a
} else {
gcd(b, a % b)
}
}

fn run(n: usize, a: Vec<usize>) -> usize {
let mut ans = a[0];

for b in 1..a.len() {
ans = ans.min(gcd(ans, a[b]));
}

ans
}

#[cfg(test)]
mod tests {
use super::*;

#[test]
fn test() {
assert_eq!(2, run(3, vec![2, 6, 6]));
assert_eq!(42, run(15, vec![546, 3192, 1932, 630, 2100, 4116, 3906, 3234, 1302, 1806, 3528, 3780, 252, 1008, 588]));
}
}
```
</details>

### ABC109 C - Skip

[C - Skip](https://atcoder.jp/contests/abc109/tasks/abc109_c)（<span style="color: brown">Difficulty : 542</span>）

<details>
<summary>コード例を見る</summary>

```rust
fn gcd(a: isize, b: isize) -> isize {
if b == 0 {
a
} else {
gcd(b, a % b)
}
}

pub fn run(_n: usize, x: isize, v: Vec<isize>) -> isize {
v.iter()
.skip(1)
.fold((x - &v[0]).abs(), |state, num| {
gcd(state, (x - num).abs())
})
}

#[cfg(test)]
mod tests {
use super::*;

#[test]
fn test() {
assert_eq!(2, run(3, 3, vec![1, 7, 11]));
assert_eq!(24, run(3, 81, vec![33, 105, 57]));
assert_eq!(999999999, run(1, 1, vec![1000000000]));;
}
}
```
</details>

### ABC118 C - Monsters Battle Royale

[C - Monsters Battle Royale](https://atcoder.jp/contests/abc118/tasks/abc118_ck)（<span style="color: brown">Difficulty : 646</span>）

<details>
<summary>コード例を見る</summary>

```rust
// https://atcoder.jp/contests/abc118/tasks/abc118_c

fn gcd(a: usize, b: usize) -> usize {
if b == 0 {
a
} else {
gcd(b, a % b)
}
}

pub fn run(_n: usize, v: Vec<usize>) -> usize {
v.iter()
.fold(0, |state, num| {
gcd(state, *num)
})
}

#[cfg(test)]
mod tests {
use super::*;

#[test]
fn test() {
assert_eq!(2, run(4, vec![2, 10, 8, 40]));
assert_eq!(1, run(4, vec![5, 13, 8, 1000000000]));
assert_eq!(1000000000, run(3, vec![1000000000, 1000000000, 1000000000]));
}
}
```
</details>

## ランレングス圧縮
Expand Down Expand Up @@ -426,7 +607,6 @@ mod tests {
}
}
```

</details>

### ABC143 C - Slimes
Expand Down Expand Up @@ -480,7 +660,6 @@ mod tests {
}
}
```

</details>

### ABC329 C - Count xxx
Expand Down Expand Up @@ -533,7 +712,6 @@ mod tests {
}

```

</details>

### ABC259 C - XX to XXX
Expand Down Expand Up @@ -619,7 +797,6 @@ mod tests {
}
}
```

</details>

### ABC047 C - 一次元リバーシ
Expand Down Expand Up @@ -668,7 +845,6 @@ mod tests {
}
}
```

</details>

### ABC127 D - Integer Cards
Expand Down Expand Up @@ -734,7 +910,6 @@ mod tests {
}
}
```

</details>

### ABC061 C - Big Array
Expand Down Expand Up @@ -778,7 +953,6 @@ mod tests {
}
}
```

</details>

# データ構造
Expand Down Expand Up @@ -828,7 +1002,6 @@ mod tests {
}
}
```

</details>

### ABC328 D - Take ABC
Expand Down Expand Up @@ -895,7 +1068,6 @@ mod tests {
}
}
```

</details>

## HashMap
Expand Down Expand Up @@ -940,7 +1112,6 @@ mod tests {
}
}
```

</details>

### ABC241 B - Pasta
Expand Down Expand Up @@ -987,7 +1158,6 @@ mod tests {
}
}
```

</details>

## HashSet
Expand Down Expand Up @@ -1034,9 +1204,7 @@ mod tests {
assert_eq!(String::from("Yes"), run("atcoder", "atcoder"));
}
}

```

</details>

<!--
Expand Down Expand Up @@ -1130,7 +1298,6 @@ mod tests {
}
}
```

</details>

### ABC147 B - Palindrome-philia
Expand Down Expand Up @@ -1256,5 +1423,4 @@ mod tests {
}
}
```

</details>
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