結果

問題 No.187 中華風 (Hard)
ユーザー akiradeveloperakiradeveloper
提出日時 2020-03-08 14:52:57
言語 Rust
(1.77.0)
結果
WA  
実行時間 -
コード長 6,796 bytes
コンパイル時間 2,741 ms
コンパイル使用メモリ 178,176 KB
実行使用メモリ 5,376 KB
最終ジャッジ日時 2024-04-24 20:09:58
合計ジャッジ時間 4,103 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge2
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 WA -
testcase_01 WA -
testcase_02 WA -
testcase_03 AC 9 ms
5,248 KB
testcase_04 AC 13 ms
5,248 KB
testcase_05 AC 13 ms
5,376 KB
testcase_06 AC 13 ms
5,376 KB
testcase_07 AC 12 ms
5,376 KB
testcase_08 AC 12 ms
5,376 KB
testcase_09 AC 12 ms
5,376 KB
testcase_10 AC 12 ms
5,376 KB
testcase_11 AC 13 ms
5,376 KB
testcase_12 AC 12 ms
5,376 KB
testcase_13 AC 5 ms
5,376 KB
testcase_14 WA -
testcase_15 WA -
testcase_16 WA -
testcase_17 AC 1 ms
5,376 KB
testcase_18 WA -
testcase_19 AC 1 ms
5,376 KB
testcase_20 AC 10 ms
5,376 KB
testcase_21 AC 1 ms
5,376 KB
testcase_22 AC 13 ms
5,376 KB
testcase_23 AC 1 ms
5,376 KB
testcase_24 WA -
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コンパイルメッセージ
warning: unused `Result` that must be used
   --> main.rs:124:5
    |
124 |     writeln!(out,"{}",ans);
    |     ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this `Result` may be an `Err` variant, which should be handled
    = note: `#[warn(unused_must_use)]` on by default
    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)

warning: 1 warning emitted

ソースコード

diff # 

#[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::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 ] } ; }
#[macro_export]
macro_rules ! cfor { ( ; $ ( $ rest : tt ) * ) => { cfor ! ( ( ) ; $ ( $ rest ) * ) } ; ( $ ( $ init : stmt ) ,+; ; $ ( $ rest : tt ) * ) => { cfor ! ( $ ( $ init ) ,+; ! false ; $ ( $ rest ) * ) } ; ( $ ( $ init : stmt ) ,+; $ cond : expr ; ; $ body : block ) => { cfor ! { $ ( $ init ) ,+; $ cond ; ( ) ; $ body } } ; ( $ ( $ init : stmt ) ,+; $ cond : expr ; $ ( $ step : expr ) ,+; $ body : block ) => { { $ ( $ init ; ) + while $ cond { let mut _first = true ; let mut _continue = false ; loop { if ! _first { _continue = true ; break } _first = false ; $ body } if ! _continue { break } $ ( $ step ; ) + } } } ; }
#[doc = " main"]
#[allow(unused_imports)]
use std::io::{stdin, stdout, BufWriter, Write};
#[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,
        xy:[(i64,i64);n]
    }
    let mut mr = vec![];
    for (x,y) in xy {
        mr.push((y,x));
    }
    let mo = 1_000_000_007;
    let ans = garner(mr, mo);
    writeln!(out,"{}",ans);
}
#[doc = "compute minimum x from a list of x % m[i] = r[i]"]
pub fn garner(mr: Vec<(i64, i64)>, mo: i64) -> i64 {
    let mut mr = mr;
    mr.push((mo, 0));
    let mut coef = vec![1; mr.len()];
    let mut constants = vec![0; mr.len()];
    for i in 0..mr.len() - 1 {
        let v = (mr[i].1 + mr[i].0 - constants[i]) * modinv(coef[i], mr[i].0) % mr[i].0;
        for j in i + 1..mr.len() {
            constants[j] += coef[j] * v;
            constants[j] %= mr[j].0;
            coef[j] *= mr[i].0;
            coef[j] %= mr[j].0;
        }
    }
    constants[mr.len() - 1]
}
#[doc = "ay=1 (mod m) -> y=a^{-1}"]
pub fn modinv(a: i64, m: i64) -> i64 {
    let (_, x, _) = extgcd(a, m);
    (m + x % m) % m
}
#[doc = "ax+by=gcd(a,b) returns (gcd, x, y)"]
#[allow(dead_code)]
pub fn extgcd(a: i64, b: i64) -> (i64, i64, i64) {
    if b == 0 {
        (a, 1, 0)
    } else {
        let (gcd, x, y) = extgcd(b, a % b);
        (gcd, y, x - (a / b) * y)
    }
}
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