結果
問題 | No.1593 Perfect Distance |
ユーザー |
![]() |
提出日時 | 2021-07-09 21:25:54 |
言語 | Rust (1.59.0) |
結果 |
AC
|
実行時間 | 14 ms / 2,000 ms |
コード長 | 2,899 bytes |
コンパイル時間 | 998 ms |
使用メモリ | 2,192 KB |
最終ジャッジ日時 | 2023-02-01 22:00:15 |
合計ジャッジ時間 | 2,171 ms |
ジャッジサーバーID (参考情報) |
judge13 / judge14 |
テストケース
テストケース表示入力 | 結果 | 実行時間 使用メモリ |
---|---|---|
testcase_00 | AC | 1 ms
2,164 KB |
testcase_01 | AC | 1 ms
2,144 KB |
testcase_02 | AC | 1 ms
2,020 KB |
testcase_03 | AC | 1 ms
2,052 KB |
testcase_04 | AC | 2 ms
2,100 KB |
testcase_05 | AC | 1 ms
2,116 KB |
testcase_06 | AC | 1 ms
2,104 KB |
testcase_07 | AC | 1 ms
2,096 KB |
testcase_08 | AC | 1 ms
2,000 KB |
testcase_09 | AC | 2 ms
2,160 KB |
testcase_10 | AC | 3 ms
2,084 KB |
testcase_11 | AC | 4 ms
2,192 KB |
testcase_12 | AC | 6 ms
2,052 KB |
testcase_13 | AC | 6 ms
2,016 KB |
testcase_14 | AC | 7 ms
2,020 KB |
testcase_15 | AC | 10 ms
2,104 KB |
testcase_16 | AC | 14 ms
2,024 KB |
testcase_17 | AC | 1 ms
2,100 KB |
testcase_18 | AC | 1 ms
2,096 KB |
testcase_19 | AC | 1 ms
2,040 KB |
ソースコード
#[allow(unused_imports)] use std::cmp::*; #[allow(unused_imports)] use std::collections::*; use std::io::{Write, BufWriter}; // https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 macro_rules! input { ($($r:tt)*) => { let stdin = std::io::stdin(); let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock())); let mut next = move || -> String{ bytes.by_ref().map(|r|r.unwrap() as char) .skip_while(|c|c.is_whitespace()) .take_while(|c|!c.is_whitespace()) .collect() }; input_inner!{next, $($r)*} }; } macro_rules! input_inner { ($next:expr) => {}; ($next:expr,) => {}; ($next:expr, $var:ident : $t:tt $($r:tt)*) => { let $var = read_value!($next, $t); input_inner!{$next $($r)*} }; } macro_rules! read_value { ($next:expr, ( $($t:tt),* )) => { ($(read_value!($next, $t)),*) }; ($next:expr, [ $t:tt ; $len:expr ]) => { (0..$len).map(|_| read_value!($next, $t)).collect::<Vec<_>>() }; ($next:expr, chars) => { read_value!($next, String).chars().collect::<Vec<char>>() }; ($next:expr, usize1) => (read_value!($next, usize) - 1); ($next:expr, [ $t:tt ]) => {{ let len = read_value!($next, usize); read_value!($next, [$t; len]) }}; ($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error")); } trait Change { fn chmax(&mut self, x: Self); fn chmin(&mut self, x: Self); } impl<T: PartialOrd> Change for T { fn chmax(&mut self, x: T) { if *self < x { *self = x; } } fn chmin(&mut self, x: T) { if *self > x { *self = x; } } } fn main() { // In order to avoid potential stack overflow, spawn a new thread. let stack_size = 104_857_600; // 100 MB let thd = std::thread::Builder::new().stack_size(stack_size); thd.spawn(|| solve()).unwrap().join().unwrap(); } fn sqrt(x: i64) -> i64 { if x <= 1 { return x; } let mut pass = 0; let mut fail = 300_000; while fail - pass > 1 { let mid = (fail + pass) / 2; if mid * mid <= x { pass = mid; } else { fail = mid; } } pass } fn solve() { let out = std::io::stdout(); let mut out = BufWriter::new(out.lock()); macro_rules! puts {($($format:tt)*) => (let _ = write!(out,$($format)*););} #[allow(unused)] macro_rules! putvec { ($v:expr) => { for i in 0..$v.len() { puts!("{}{}", $v[i], if i + 1 == $v.len() {"\n"} else {" "}); } } } input!(n: i64); let mut tot = 0i64; for i in 1..n + 1 { let y2 = n * n - i * i; if y2 == 0 { continue; } else { let s = sqrt(y2); if s * s == y2 { tot += 1; } } } puts!("{}\n", tot); }