結果

問題 No.982 Add
ユーザー akiradeveloperakiradeveloper
提出日時 2020-02-11 13:56:14
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 126 ms / 2,000 ms
コード長 5,674 bytes
コンパイル時間 12,185 ms
コンパイル使用メモリ 383,740 KB
実行使用メモリ 6,820 KB
最終ジャッジ日時 2024-10-01 07:27:25
合計ジャッジ時間 13,713 ms
ジャッジサーバーID
(参考情報)
judge1 / judge2
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 23
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: unused `Result` that must be used
   --> src/main.rs:118:9
    |
118 |         writeln!(out,"-1");
    |         ^^^^^^^^^^^^^^^^^^
    |
    = 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: unused `Result` that must be used
   --> src/main.rs:138:5
    |
138 |     writeln!(out,"{}",tot);
    |     ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this `Result` may be an `Err` variant, which should be handled
    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)

ソースコード

diff #
プレゼンテーションモードにする

#[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 ] } ; }
#[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!{
a:i64,b:i64
}
let g = gcd(a,b);
// dbg!(g);
if g > 1 {
writeln!(out,"-1");
return
}
let l = lcm(a,b);
let mut tot = 0;
for z in 1..=l {
let mut found = false;
for x in 0..=100 {
for y in 0..=100 {
if a*x + b*y == z {
found = true;
}
}
}
if !found {
tot += 1;
}
}
writeln!(out,"{}",tot);
}
#[allow(dead_code)]
pub fn lcm(a: i64, b: i64) -> i64 {
a / gcd(a, b) * b
}
#[allow(dead_code)]
pub fn gcd(a: i64, b: i64) -> i64 {
if b == 0 {
a
} else {
gcd(b, a % b)
}
}
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