結果
| 問題 |
No.2420 Simple Problem
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2023-08-12 14:10:23 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,085 bytes |
| コンパイル時間 | 14,231 ms |
| コンパイル使用メモリ | 378,124 KB |
| 実行使用メモリ | 6,820 KB |
| 最終ジャッジ日時 | 2024-11-19 17:40:16 |
| 合計ジャッジ時間 | 20,511 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | WA * 33 |
ソースコード
pub mod binary_search {
type T = usize;
pub fn binary_search(mut ok: T, mut ng: T, f: impl Fn(T) -> bool) -> T {
let cont = |ok: T, ng: T| {
let l = ok.min(ng);
let r = ok.max(ng);
l + 1 < r
};
while cont(ok, ng) {
let x = (ok + ng) / 2;
if f(x) {
ok = x;
} else {
ng = x;
}
}
ok
}
}
pub mod scanner {
pub struct Scanner {
buf: Vec<String>,
}
impl Scanner {
pub fn new() -> Self {
Self { buf: vec![] }
}
pub fn new_from(source: &str) -> Self {
let source = String::from(source);
let buf = Self::split(source);
Self { buf }
}
pub fn next<T: std::str::FromStr>(&mut self) -> T {
loop {
if let Some(x) = self.buf.pop() {
return x.parse().ok().expect("");
}
let mut source = String::new();
std::io::stdin().read_line(&mut source).expect("");
self.buf = Self::split(source);
}
}
fn split(source: String) -> Vec<String> {
source
.split_whitespace()
.rev()
.map(String::from)
.collect::<Vec<_>>()
}
}
}
use crate::{binary_search::binary_search, scanner::Scanner};
use std::io::Write;
fn main() {
let mut scanner = Scanner::new();
let out = std::io::stdout();
let mut out = std::io::BufWriter::new(out.lock());
let t: usize = scanner.next();
for _ in 0..t {
solve(&mut scanner, &mut out);
}
}
fn solve(scanner: &mut Scanner, out: &mut std::io::BufWriter<std::io::StdoutLock>) {
let a: usize = scanner.next();
let b: usize = scanner.next();
let xx = binary_search(1e9 as usize, a + b, |xx| {
a * b * 4 < (xx - a - b) * (xx - a - b)
});
let x = binary_search(xx, 0, |x| xx <= x * x);
writeln!(out, "{}", x).unwrap();
}