結果

問題 No.5017 Tool-assisted Shooting
ユーザー terry_u16terry_u16
提出日時 2023-07-16 17:31:14
言語 Rust
(1.77.0 + proconio)
結果
AC  
実行時間 180 ms / 2,000 ms
コード長 9,500 bytes
コンパイル時間 1,879 ms
コンパイル使用メモリ 152,420 KB
実行使用メモリ 24,336 KB
スコア 4,252,507
平均クエリ数 1000.00
最終ジャッジ日時 2023-07-16 17:31:39
合計ジャッジ時間 23,106 ms
ジャッジサーバーID
（参考情報） 		judge13 / judge15
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このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 162 ms
23,580 KB
testcase_01 AC 159 ms
23,532 KB
testcase_02 AC 150 ms
23,424 KB
testcase_03 AC 153 ms
24,228 KB
testcase_04 AC 155 ms
23,496 KB
testcase_05 AC 152 ms
23,664 KB
testcase_06 AC 162 ms
24,048 KB
testcase_07 AC 153 ms
23,508 KB
testcase_08 AC 165 ms
24,144 KB
testcase_09 AC 152 ms
23,580 KB
testcase_10 AC 158 ms
24,228 KB
testcase_11 AC 155 ms
23,616 KB
testcase_12 AC 158 ms
23,376 KB
testcase_13 AC 154 ms
23,664 KB
testcase_14 AC 156 ms
23,508 KB
testcase_15 AC 154 ms
23,916 KB
testcase_16 AC 153 ms
23,580 KB
testcase_17 AC 156 ms
24,192 KB
testcase_18 AC 163 ms
23,904 KB
testcase_19 AC 157 ms
24,336 KB
testcase_20 AC 154 ms
23,664 KB
testcase_21 AC 173 ms
24,276 KB
testcase_22 AC 153 ms
23,376 KB
testcase_23 AC 152 ms
23,604 KB
testcase_24 AC 155 ms
23,388 KB
testcase_25 AC 154 ms
23,652 KB
testcase_26 AC 152 ms
23,520 KB
testcase_27 AC 152 ms
23,412 KB
testcase_28 AC 163 ms
24,036 KB
testcase_29 AC 151 ms
24,228 KB
testcase_30 AC 150 ms
23,436 KB
testcase_31 AC 153 ms
23,520 KB
testcase_32 AC 157 ms
24,192 KB
testcase_33 AC 156 ms
23,412 KB
testcase_34 AC 156 ms
23,832 KB
testcase_35 AC 152 ms
23,892 KB
testcase_36 AC 154 ms
23,628 KB
testcase_37 AC 153 ms
24,048 KB
testcase_38 AC 178 ms
23,424 KB
testcase_39 AC 153 ms
23,664 KB
testcase_40 AC 155 ms
24,048 KB
testcase_41 AC 152 ms
23,904 KB
testcase_42 AC 157 ms
23,640 KB
testcase_43 AC 155 ms
24,036 KB
testcase_44 AC 153 ms
24,012 KB
testcase_45 AC 152 ms
23,580 KB
testcase_46 AC 156 ms
24,192 KB
testcase_47 AC 153 ms
24,276 KB
testcase_48 AC 170 ms
24,276 KB
testcase_49 AC 154 ms
23,628 KB
testcase_50 AC 154 ms
23,904 KB
testcase_51 AC 153 ms
24,036 KB
testcase_52 AC 153 ms
23,844 KB
testcase_53 AC 155 ms
23,376 KB
testcase_54 AC 163 ms
23,844 KB
testcase_55 AC 153 ms
23,412 KB
testcase_56 AC 152 ms
23,424 KB
testcase_57 AC 162 ms
23,892 KB
testcase_58 AC 162 ms
23,424 KB
testcase_59 AC 154 ms
23,556 KB
testcase_60 AC 152 ms
23,412 KB
testcase_61 AC 156 ms
23,376 KB
testcase_62 AC 152 ms
24,276 KB
testcase_63 AC 163 ms
23,832 KB
testcase_64 AC 155 ms
23,592 KB
testcase_65 AC 164 ms
24,264 KB
testcase_66 AC 154 ms
23,364 KB
testcase_67 AC 160 ms
23,388 KB
testcase_68 AC 178 ms
24,240 KB
testcase_69 AC 152 ms
23,904 KB
testcase_70 AC 152 ms
24,132 KB
testcase_71 AC 158 ms
24,204 KB
testcase_72 AC 155 ms
23,424 KB
testcase_73 AC 160 ms
23,508 KB
testcase_74 AC 154 ms
23,820 KB
testcase_75 AC 155 ms
23,832 KB
testcase_76 AC 158 ms
24,228 KB
testcase_77 AC 155 ms
23,616 KB
testcase_78 AC 180 ms
23,652 KB
testcase_79 AC 152 ms
24,240 KB
testcase_80 AC 154 ms
23,664 KB
testcase_81 AC 159 ms
23,808 KB
testcase_82 AC 153 ms
24,060 KB
testcase_83 AC 154 ms
23,424 KB
testcase_84 AC 153 ms
23,664 KB
testcase_85 AC 155 ms
24,228 KB
testcase_86 AC 153 ms
24,060 KB
testcase_87 AC 153 ms
24,180 KB
testcase_88 AC 154 ms
23,424 KB
testcase_89 AC 155 ms
23,916 KB
testcase_90 AC 155 ms
24,048 KB
testcase_91 AC 161 ms
24,216 KB
testcase_92 AC 151 ms
24,060 KB
testcase_93 AC 154 ms
23,892 KB
testcase_94 AC 152 ms
24,036 KB
testcase_95 AC 164 ms
23,508 KB
testcase_96 AC 155 ms
23,640 KB
testcase_97 AC 160 ms
24,144 KB
testcase_98 AC 156 ms
23,844 KB
testcase_99 AC 154 ms
23,604 KB
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ソースコード

diff # 

use std::io::Write;

macro_rules! get {
      ($t:ty) => {
          {
              let mut line: String = String::new();
              std::io::stdin().read_line(&mut line).unwrap();
              line.trim().parse::<$t>().unwrap()
          }
      };
      ($($t:ty),*) => {
          {
              let mut line: String = String::new();
              std::io::stdin().read_line(&mut line).unwrap();
              let mut iter = line.split_whitespace();
              (
                  $(iter.next().unwrap().parse::<$t>().unwrap(),)*
              )
          }
      };
      ($t:ty; $n:expr) => {
          (0..$n).map(|_|
              get!($t)
          ).collect::<Vec<_>>()
      };
      ($($t:ty),*; $n:expr) => {
          (0..$n).map(|_|
              get!($($t),*)
          ).collect::<Vec<_>>()
      };
      ($t:ty ;;) => {
          {
              let mut line: String = String::new();
              std::io::stdin().read_line(&mut line).unwrap();
              line.split_whitespace()
                  .map(|t| t.parse::<$t>().unwrap())
                  .collect::<Vec<_>>()
          }
      };
      ($t:ty ;; $n:expr) => {
          (0..$n).map(|_| get!($t ;;)).collect::<Vec<_>>()
      };
}

pub trait ChangeMinMax {
    fn change_min(&mut self, v: Self) -> bool;
    fn change_max(&mut self, v: Self) -> bool;
}

impl<T: PartialOrd> ChangeMinMax for T {
    fn change_min(&mut self, v: T) -> bool {
        *self > v && {
            *self = v;
            true
        }
    }

    fn change_max(&mut self, v: T) -> bool {
        *self < v && {
            *self = v;
            true
        }
    }
}

const MAX_TURN: usize = 1000;
const DEFAULT_SIMULATION_LEN: usize = 15;
const HEIGHT: usize = 60;
const WIDTH: usize = 25;
const CENTER: usize = 12;
const L: usize = !0;
const C: usize = 0;
const R: usize = 1;

#[derive(Debug, Clone)]
struct State {
    column: usize,
    power: u32,
    raw_score: u32,
    score: f64,
    turn: usize,
    enemies: EnemyState,
}

impl State {
    fn new() -> Self {
        Self {
            column: CENTER,
            power: 100,
            raw_score: 0,
            turn: 0,
            score: 0.0,
            enemies: EnemyState::new(),
        }
    }

    fn level(&self) -> u32 {
        self.power / 100
    }

    fn move_player(&mut self, direction: usize) {
        self.column = (self.column + direction + WIDTH) % WIDTH;
    }

    fn attack(&mut self, enemy_collection: &EnemyCollection) {
        let level = self.level();

        if self.enemies.has_enemy(enemy_collection, self.column) {
            let (hp, power) = self.enemies.damage(enemy_collection, self.column, level);
            self.raw_score += hp;
            self.power += power;
        }
    }

    fn progress_turn(&mut self, enemy_collection: &EnemyCollection, direction: usize) -> bool {
        let mut alive = true;
        self.enemies.clean_up_enemies(enemy_collection, self.turn);
        alive &= !self.enemies.crash(enemy_collection, self.column, self.turn);
        self.move_player(direction);
        alive &= !self.enemies.crash(enemy_collection, self.column, self.turn);
        self.attack(enemy_collection);
        self.turn += 1;

        self.update_score(enemy_collection);

        alive
    }

    fn update_score(&mut self, enemy_collection: &EnemyCollection) {
        let mut raw_score_point = self.raw_score as f64;
        let mut power_point = self.power as f64;
        let cols = [
            ((self.column + WIDTH - L) % WIDTH, 0.5),
            (self.column, 1.0),
            ((self.column + R) % WIDTH, 0.5),
        ];

        for &(col, coef) in &cols {
            if let Some(enemy) = self.enemies.get(enemy_collection, col) {
                let ratio = self.enemies.damages[col] as f64 / enemy.hp as f64;
                let coef = coef * ratio * ratio * 0.5;
                raw_score_point += enemy.hp as f64 * coef;
                power_point += enemy.power as f64 * coef;
            }
        }

        let raw_score_coef = self.turn as f64;
        let power_point_coef = (MAX_TURN - self.turn) as f64;
        self.score = raw_score_point * raw_score_coef + power_point * power_point_coef;
    }
}

#[derive(Debug, Clone, Copy, Default)]
struct Enemy {
    hp: u32,
    power: u32,
    spawn_turn: usize,
}

impl Enemy {
    fn new(hp: u32, power: u32, spawn_turn: usize) -> Self {
        Self {
            hp,
            power,
            spawn_turn,
        }
    }

    fn is_out_of_range(&self, turn: usize) -> bool {
        self.spawn_turn + HEIGHT <= turn
    }

    fn is_bottom(&self, turn: usize) -> bool {
        self.spawn_turn + HEIGHT - 1 == turn
    }
}

#[derive(Debug, Clone)]
struct EnemyState {
    indices: [usize; WIDTH],
    damages: [u32; WIDTH],
}

impl EnemyState {
    fn new() -> Self {
        Self {
            indices: [0; WIDTH],
            damages: [0; WIDTH],
        }
    }

    fn has_enemy(&self, enemies: &EnemyCollection, column: usize) -> bool {
        self.get(enemies, column).is_some()
    }

    fn get<'a>(&self, enemies: &'a EnemyCollection, column: usize) -> Option<&'a Enemy> {
        enemies.get(column, self.indices[column])
    }

    fn crash(&self, enemies: &EnemyCollection, column: usize, turn: usize) -> bool {
        if let Some(enemy) = enemies.get(column, self.indices[column]) {
            enemy.is_bottom(turn)
        } else {
            false
        }
    }

    fn damage(&mut self, enemies: &EnemyCollection, column: usize, attack: u32) -> (u32, u32) {
        let enemy = enemies.get(column, self.indices[column]).unwrap();
        self.damages[column] += attack;

        if self.damages[column] >= enemy.hp {
            self.damages[column] = 0;
            self.indices[column] += 1;
            (enemy.hp, enemy.power)
        } else {
            (0, 0)
        }
    }

    fn clean_up_enemies(&mut self, enemies: &EnemyCollection, turn: usize) {
        for (column, (index, damage)) in self
            .indices
            .iter_mut()
            .zip(self.damages.iter_mut())
            .enumerate()
        {
            if let Some(enemy) = enemies.get(column, *index) {
                if enemy.is_out_of_range(turn) {
                    *damage = 0;
                    *index += 1;
                }
            }
        }
    }
}

#[derive(Debug, Clone)]
struct EnemyCollection {
    enemies: Vec<Vec<Enemy>>,
}

impl EnemyCollection {
    fn new() -> Self {
        Self {
            enemies: vec![vec![]; WIDTH],
        }
    }

    fn spawn(&mut self, enemies: &[(u32, u32, usize)], turn: usize) {
        for &(hp, power, col) in enemies {
            self.enemies[col].push(Enemy::new(hp, power, turn));
        }
    }

    fn get(&self, column: usize, index: usize) -> Option<&Enemy> {
        self.enemies[column].get(index)
    }
}

fn main() {
    let mut state = State::new();
    let mut enemy_collection = EnemyCollection::new();
    let mut turn = 0;

    while let Some(enemies) = read_spawns() {
        enemy_collection.spawn(&enemies, turn);
        let mut current_states = vec![None; WIDTH];
        current_states[state.column] = Some((state.clone(), C));
        let simulation_len = DEFAULT_SIMULATION_LEN.min(MAX_TURN - turn);

        for iter in 0..simulation_len {
            let mut next_states: Vec<Option<(State, usize)>> = vec![None; WIDTH];

            for state in current_states.iter() {
                if let Some((state, first_dir)) = state {
                    for &dir in &[L, C, R] {
                        let mut state = state.clone();
                        let is_alive = state.progress_turn(&enemy_collection, dir);

                        if !is_alive {
                            continue;
                        }

                        let next_col = state.column;

                        if next_states[next_col]
                            .as_ref()
                            .map_or(std::f64::MIN, |s| s.0.score)
                            < state.score
                        {
                            let dir = if iter == 0 { dir } else { *first_dir };
                            next_states[next_col] = Some((state, dir));
                        }
                    }
                }
            }

            current_states = next_states;
        }

        let mut best_score = std::f64::MIN;
        let mut best_dir = C;

        for s in current_states.iter() {
            if let Some((state, dir)) = s {
                if best_score.change_max(state.score) {
                    best_dir = *dir;
                }
            }
        }

        write_direction(best_dir);
        state.progress_turn(&enemy_collection, best_dir);
        turn += 1;

        eprintln!("power: {}", state.power);
        eprintln!("score: {}", state.raw_score);
        eprintln!("turn: {}", turn + 1);
        eprintln!("best_score: {}", best_score);
        eprintln!("");

        if turn == MAX_TURN {
            break;
        }
    }
}

fn read_spawns() -> Option<Vec<(u32, u32, usize)>> {
    let n = get!(i32);

    if n < 0 {
        return None;
    }

    let mut enemies = vec![];

    for _ in 0..n {
        enemies.push(get!(u32, u32, usize));
    }

    Some(enemies)
}

fn write_direction(direction: usize) {
    match direction {
        L => println!("L"),
        C => println!("S"),
        R => println!("R"),
        _ => unreachable!(),
    }

    std::io::stdout().flush().unwrap();
}
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