結果
| 問題 |
No.3258 Xor Division Game
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2025-10-17 16:36:57 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 1,859 bytes |
| コンパイル時間 | 11,101 ms |
| コンパイル使用メモリ | 405,008 KB |
| 実行使用メモリ | 380,852 KB |
| 最終ジャッジ日時 | 2025-10-17 16:37:19 |
| 合計ジャッジ時間 | 19,647 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 17 TLE * 1 -- * 49 |
コンパイルメッセージ
warning: unused variable: `n`
--> src/main.rs:41:9
|
41 | let n = a.len();
| ^ help: if this is intentional, prefix it with an underscore: `_n`
|
= note: `#[warn(unused_variables)]` on by default
warning: field `freq` is never read
--> src/main.rs:14:5
|
10 | struct Stat {
| ---- field in this struct
...
14 | freq: HashMap<u32, i32>,
| ^^^^
|
= note: `Stat` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
= note: `#[warn(dead_code)]` on by default
ソースコード
use std::collections::*;
fn getline() -> String {
let mut ret = String::new();
std::io::stdin().read_line(&mut ret).unwrap();
ret
}
#[derive(Debug)]
struct Stat {
l: usize,
r: usize,
unique: BTreeSet<usize>, // index
freq: HashMap<u32, i32>,
}
fn facil(a: &[u32], l: usize, r: usize) -> Stat {
let b = &a[l..r];
let mut freq = HashMap::new();
for &f in b {
*freq.entry(f).or_insert(0) += 1;
}
let stat = Stat {
l,
r,
unique: {
let mut x = BTreeSet::new();
for i in l..r {
if freq[&a[i]] == 1 {
x.insert(i);
}
}
x
},
freq,
};
stat
}
fn rec(a: &[u32], s: Stat) -> i32 {
let n = a.len();
let mut seen = s.l;
let mut ans = 0;
for &idx in &s.unique {
// TODO: O(n^2)
let t = facil(&a, seen, idx);
ans += rec(a, t) + 1;
seen = idx + 1;
}
if seen > s.l && seen < s.r {
let t = facil(&a, seen, s.r);
ans += rec(a, t);
}
// eprintln!("stat = {s:?}, ans = {ans}");
ans
}
// https://yukicoder.me/problems/no/3258 (3.5)
fn main() {
getline();
let f = getline().trim().split_whitespace()
.map(|x| x.parse::<u32>().unwrap())
.collect::<Vec<_>>();
let n = f.len();
let mut freq = HashMap::new();
for &f in &f {
*freq.entry(f).or_insert(0) += 1;
}
let stat = Stat {
l: 0,
r: n,
unique: {
let mut x = BTreeSet::new();
for i in 0..n {
if freq[&f[i]] == 1 {
x.insert(i);
}
}
x
},
freq,
};
println!("{}", if rec(&f, stat) % 2 == 1 {
"Alice"
} else {
"Bob"
});
}