結果
問題 | No.530 年齢って毎年変わるし覚えるの難しいよね |
ユーザー |
![]() |
提出日時 | 2019-03-14 18:11:24 |
言語 | Rust (1.83.0 + proconio) |
結果 |
AC
|
実行時間 | 1 ms / 2,000 ms |
コード長 | 5,248 bytes |
コンパイル時間 | 14,018 ms |
コンパイル使用メモリ | 391,664 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-06-26 22:34:26 |
合計ジャッジ時間 | 15,771 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 |
---|---|
other | AC * 48 |
コンパイルメッセージ
warning: unused `Result` that must be used --> src/main.rs:180:5 | 180 | writeln!(buf, "{}", res); | ^^^^^^^^^^^^^^^^^^^^^^^^ | = 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)
ソースコード
/*------------------------------------------------------------------*//*------------------------- begin template -------------------------*//*------------------------------------------------------------------*/// ref: tanakh <https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8>// diff: using Parsermacro_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_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_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, i64_) => {$parser.fast_i64()};($parser:ident, usize_) => {$parser.fast_i64() as usize};($parser:ident, usize1_) => {($parser.fast_i64() - 1) as usize};($parser:ident, $t:ty) => {$parser.next::<$t>().expect("Parse error")};}use std::io;use std::io::BufRead;use std::str;// ref: tatsuya6502 <https://qiita.com/tatsuya6502/items/cd448486f7ef7b5b8c7e>// ref: wariuni <https://qiita.com/tatsuya6502/items/cd448486f7ef7b5b8c7e#comment-7040a5ae96305e884eb9>// diff: using std::io::BufRead::fill_buf()pub struct Parser<R> {pub 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();(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 unsafe { str::from_utf8_unchecked(&self.buf[begin..end]) }.parse::<T>();} else {self.update_buf();}}}pub fn fast_i64(&mut self) -> i64 {loop {let mut begin = self.pos;while begin < self.buf.len() && (self.buf[begin] <= 0x20) {begin += 1;}if begin == self.buf.len() {self.update_buf();continue;}let mut res = 0;let (is_positive, mut end) = match self.buf[begin] {b'+' => (true, begin + 1),b'-' => (false, begin + 1),_ => (true, begin),};while end < self.buf.len() && (self.buf[end] > 0x20) {res = res * 10 + (self.buf[end] as i64 - '0' as i64);end += 1;}if begin != self.buf.len() {self.pos = end;return if is_positive { res } else { -res };} else {self.update_buf();}}}}#[allow(unused_imports)]use std::cmp::*;fn main() {input! {new_stdin_parser = parser,}let res = solve(&mut parser);print!("{}", res);}/*------------------------------------------------------------------*//*-------------------------- end template --------------------------*//*------------------------------------------------------------------*/use std::fmt::Write;fn solve<R: BufRead>(parser: &mut Parser<R>) -> String {let mut buf = String::new();input! {parser = parser,n: i64,}let res = 2017 - n;writeln!(buf, "{}", res);buf}