#404945 (Rust) No.942 プレゼント配り

提出ソース

結果

問題	No.942 プレゼント配り
コンテスト
ユーザー	akiradeveloper
提出日時	2019-12-05 01:01:24
言語	Rust (1.83.0 + proconio)
結果	WA
実行時間	-
コード長	7,131 bytes
コンパイル時間	13,563 ms
コンパイル使用メモリ	401,176 KB
実行使用メモリ	20,480 KB
最終ジャッジ日時	2024-12-14 18:53:09
合計ジャッジ時間	15,721 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 * 14 WA * 4

権限があれば一括ダウンロードができます

コンパイルメッセージ

warning: use of deprecated method `std::slice::<impl [T]>::connect`: renamed to join
   --> src/main.rs:168:35
    |
168 |         let s = vec_to_string(&v).connect(" ");
    |                                   ^^^^^^^
    |
    = note: `#[warn(deprecated)]` on by default
help: replace the use of the deprecated method
    |
168 |         let s = vec_to_string(&v).join(" ");
    |                                   ~~~~

warning: unused variable: `out`
   --> src/main.rs:112:13
    |
112 |     let mut out = BufWriter::new(out.lock());
    |             ^^^ help: if this is intentional, prefix it with an underscore: `_out`
    |
    = note: `#[warn(unused_variables)]` on by default

warning: variable does not need to be mutable
   --> src/main.rs:112:9
    |
112 |     let mut out = BufWriter::new(out.lock());
    |         ----^^^
    |         |
    |         help: remove this `mut`
    |
    = note: `#[warn(unused_mut)]` on by default

warning: method `add` is never used
   --> src/main.rs:190:8
    |
183 | impl CumSum1 {
    | ------------ method in this implementation
...
190 |     fn add(&mut self, i: usize, x: usize) {
    |        ^^^
    |
    = note: `#[warn(dead_code)]` on by default

ソースコード

raw source code

#[doc = " https://github.com/hatoo/competitive-rust-snippets"]
#[allow(unused_imports)]
use std::cmp::{max, min, Ordering};
#[allow(unused_imports)]
use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, VecDeque};
#[allow(unused_imports)]
use std::io::{stdin, stdout, BufWriter, Write};
#[allow(unused_imports)]
use std::iter::FromIterator;
#[macro_export]
macro_rules ! chmax { ( $ x : expr , $ ( $ v : expr ) ,+ ) => { $ ( $ x = std :: cmp :: max ( $ x ,$ v ) ; ) + } ; }
#[macro_export]
macro_rules ! chmin { ( $ x : expr , $ ( $ v : expr ) ,+ ) => { $ ( $ x = std :: cmp :: min ( $ x ,$ v ) ; ) + } ; }
#[macro_export]
macro_rules ! max { ( $ x : expr ) => ( $ x ) ; ( $ x : expr , $ ( $ xs : expr ) ,+ ) => { std :: cmp :: max ( $ x , max ! ( $ ( $ xs ) ,+ ) ) } ; }
#[macro_export]
macro_rules ! min { ( $ x : expr ) => ( $ x ) ; ( $ x : expr , $ ( $ xs : expr ) ,+ ) => { std :: cmp :: min ( $ x , min ! ( $ ( $ xs ) ,+ ) ) } ; }
#[macro_export]
macro_rules ! dvec { ( $ t : expr ; $ len : expr ) => { vec ! [ $ t ; $ len ] } ; ( $ t : expr ; $ len : expr , $ ( $ rest : expr ) ,* ) => { vec ! [ dvec ! ( $ t ; $ ( $ rest ) ,* ) ; $ len ] } ; }
#[allow(unused_macros)]
macro_rules ! debug { ( $ ( $ a : expr ) ,* ) => { eprintln ! ( concat ! ( $ ( stringify ! ( $ a ) , " = {:?}, " ) ,* ) , $ ( $ a ) ,* ) ; } }
#[macro_export]
macro_rules ! input { ( source = $ s : expr , $ ( $ r : tt ) * ) => { let mut parser = Parser :: from_str ( $ s ) ; input_inner ! { parser , $ ( $ r ) * } } ; ( parser = $ parser : ident , $ ( $ r : tt ) * ) => { input_inner ! { $ parser , $ ( $ r ) * } } ; ( new_stdin_parser = $ parser : ident , $ ( $ r : tt ) * ) => { let stdin = std :: io :: stdin ( ) ; let reader = std :: io :: BufReader :: new ( stdin . lock ( ) ) ; let mut $ parser = Parser :: new ( reader ) ; input_inner ! { $ parser , $ ( $ r ) * } } ; ( $ ( $ r : tt ) * ) => { input ! { new_stdin_parser = parser , $ ( $ r ) * } } ; }
#[macro_export]
macro_rules ! input_inner { ( $ parser : ident ) => { } ; ( $ parser : ident , ) => { } ; ( $ parser : ident , $ var : ident : $ t : tt $ ( $ r : tt ) * ) => { let $ var = read_value ! ( $ parser , $ t ) ; input_inner ! { $ parser $ ( $ r ) * } } ; }
#[macro_export]
macro_rules ! read_value { ( $ parser : ident , ( $ ( $ t : tt ) ,* ) ) => { ( $ ( read_value ! ( $ parser , $ t ) ) ,* ) } ; ( $ parser : ident , [ $ t : tt ; $ len : expr ] ) => { ( 0 ..$ len ) . map ( | _ | read_value ! ( $ parser , $ t ) ) . collect ::< Vec < _ >> ( ) } ; ( $ parser : ident , chars ) => { read_value ! ( $ parser , String ) . chars ( ) . collect ::< Vec < char >> ( ) } ; ( $ parser : ident , usize1 ) => { read_value ! ( $ parser , usize ) - 1 } ; ( $ parser : ident , $ t : ty ) => { $ parser . next ::<$ t > ( ) . expect ( "Parse error" ) } ; }
use std::io;
use std::io::BufRead;
use std::str;
pub struct Parser<R> {
    reader: R,
    buf: Vec<u8>,
    pos: usize,
}
impl Parser<io::Empty> {
    pub fn from_str(s: &str) -> Parser<io::Empty> {
        Parser {
            reader: io::empty(),
            buf: s.as_bytes().to_vec(),
            pos: 0,
        }
    }
}
impl<R: BufRead> Parser<R> {
    pub fn new(reader: R) -> Parser<R> {
        Parser {
            reader: reader,
            buf: vec![],
            pos: 0,
        }
    }
    pub fn update_buf(&mut self) {
        self.buf.clear();
        self.pos = 0;
        loop {
            let (len, complete) = {
                let buf2 = self.reader.fill_buf().unwrap();
                self.buf.extend_from_slice(buf2);
                let len = buf2.len();
                if len == 0 {
                    break;
                }
                (len, buf2[len - 1] <= 0x20)
            };
            self.reader.consume(len);
            if complete {
                break;
            }
        }
    }
    pub fn next<T: str::FromStr>(&mut self) -> Result<T, T::Err> {
        loop {
            let mut begin = self.pos;
            while begin < self.buf.len() && (self.buf[begin] <= 0x20) {
                begin += 1;
            }
            let mut end = begin;
            while end < self.buf.len() && (self.buf[end] > 0x20) {
                end += 1;
            }
            if begin != self.buf.len() {
                self.pos = end;
                return str::from_utf8(&self.buf[begin..end]).unwrap().parse::<T>();
            } else {
                self.update_buf();
            }
        }
    }
}
#[allow(unused_macros)]
macro_rules ! debug { ( $ ( $ a : expr ) ,* ) => { eprintln ! ( concat ! ( $ ( stringify ! ( $ a ) , " = {:?}, " ) ,* ) , $ ( $ a ) ,* ) ; } }
#[doc = " https://github.com/hatoo/competitive-rust-snippets"]
const BIG_STACK_SIZE: bool = true;
#[allow(dead_code)]
fn main() {
    use std::thread;
    if BIG_STACK_SIZE {
        thread::Builder::new()
            .stack_size(32 * 1024 * 1024)
            .name("solve".into())
            .spawn(solve)
            .unwrap()
            .join()
            .unwrap();
    } else {
        solve();
    }
}
fn solve() {
    let out = stdout();
    let mut out = BufWriter::new(out.lock());

    input!{
        n:usize,
        k:usize,
    }

    let mut v = VecDeque::new();
    let mut cum1 = CumSum1::new(n);
    for i in 1..n+1 {
        v.push_back(i);
        cum1.set(i-1,i);
    }
    cum1.build();

    let total = n*(n+1)/2;
    if total % k != 0 {
        println!("No");
        return
    }
    let sum = total/k;

    let mut fi = None;
    let m = n/k;
    for j in 0..m+1 {
        let l = cum1.query(0, j); // j
        let r = cum1.query(n-(m-j), n); // m-j
        if l+r == sum {
            fi = Some(j)
        }
    }
    if fi.is_none() {
        println!("No");
        return
    }

    let mut res = vec![];
    let fi = fi.unwrap();
    let la = m-fi;
    while !v.is_empty() {
        let mut tmp = vec![];
        for _ in 0..fi {
            if let Some(x) = v.pop_front() {
                tmp.push(x);
            }
        }
        for _ in 0..la {
            if let Some(x) = v.pop_back() {
                tmp.push(x);
            }
        }
        res.push(tmp);
    }

    println!("Yes");
    for v in res {
        let s = vec_to_string(&v).connect(" ");
        println!("{}", s);
    }
}
pub fn vec_to_string<T: ToString>(xs: &[T]) -> Vec<String> {
    let mut res = vec![];
    for x in xs {
        res.push(x.to_string());
    }
    res
}
struct CumSum1 {
    base: Vec<usize>,
    dp: Vec<usize>,
}
impl CumSum1 {
    fn new(n: usize) -> CumSum1 {
        CumSum1 {
            base: vec![0; n],
            dp: vec![],
        }
    }
    fn add(&mut self, i: usize, x: usize) {
        self.base[i] += x;
    }
    fn set(&mut self, i: usize, x: usize) {
        self.base[i] = x;
    }
    fn build(&mut self) {
        let n = self.base.len();
        let mut dp = vec![0; n + 1];
        let mut acc = 0;
        for i in 0..n {
            acc += self.base[i];
            dp[i + 1] = acc;
        }
        self.dp = dp;
    }
    #[doc = "[i,j)"]
    fn query(&self, i: usize, j: usize) -> usize {
        self.dp[j] - self.dp[i]
    }
}

yukicoder

結果

コンパイルメッセージ

ソースコード