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use std::str::FromStr;
static mut GLOBAL_STDIN : Option<std::io::Stdin> = None;
static mut GLOBAL_LOCK : Option<std::io::StdinLock> = None;
pub trait Input : Sized {
fn input() -> Self;
}
impl Input for String {
fn input() -> String {
let mut line = String::new();
use std::io::BufRead;
unsafe {
GLOBAL_LOCK.as_mut().unwrap().read_line(&mut line).unwrap();
}
if line.ends_with('\n') {
line.pop();
}
line
}
}
impl Input for () {
fn input() -> Self {
drop(String::input());
}
}
macro_rules! primitive_impls {
($($T:ty)*) => {
$(
impl Input for $T {
fn input() -> Self {
let line = String::input();
Self::from_str(line.trim_right()).unwrap()
}
}
)*
}
}
primitive_impls! {
u8 i8
u16 i16
u32 i32
u64 i64
usize isize
f32 f64
char
}
impl<T: FromStr> Input for Vec<T> {
fn input() -> Self {
let line = String::input();
line.split_whitespace()
.map(|word| T::from_str(word).ok().unwrap())
.collect::<Vec<T>>()
}
}
macro_rules! array_impls {
($len:expr; $($idx:expr)*) => {
impl <T: FromStr> Input for [T; $len] {
fn input() -> Self {
let line = String::input();
let words = line.split_whitespace().collect::<Vec<&str>>();
assert_eq!(words.len(), $len, "Expected {} values but got {}", $len, words.len());
[
$(T::from_str(words[$idx]).ok().unwrap()),*
]
}
}
}
}
array_impls!(2; 0 1);
array_impls!(3; 0 1 2);
array_impls!(4; 0 1 2 3);
array_impls!(5; 0 1 2 3 4);
array_impls!(6; 0 1 2 3 4 5);
array_impls!(7; 0 1 2 3 4 5 6);
array_impls!(8; 0 1 2 3 4 5 6 7);
array_impls!(9; 0 1 2 3 4 5 6 7 8);
array_impls!(10; 0 1 2 3 4 5 6 7 8 9);
array_impls!(11; 0 1 2 3 4 5 6 7 8 9 10);
array_impls!(12; 0 1 2 3 4 5 6 7 8 9 10 11);
array_impls!(13; 0 1 2 3 4 5 6 7 8 9 10 11 12);
array_impls!(14; 0 1 2 3 4 5 6 7 8 9 10 11 12 13);
array_impls!(15; 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14);
array_impls!(16; 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15);
macro_rules! tuple_impls {
($len:expr; $($idx:tt $T:ident)*) => {
impl<$($T : FromStr),+> Input for ($($T,)*) {
fn input() -> Self {
let line = String::input();
let words = line.split_whitespace().collect::<Vec<&str>>();
assert_eq!(words.len(), $len, "Expected {} values but got {}", $len, words.len());
(
$($T::from_str(words[$idx]).ok().unwrap(),)*
)
}
}
}
}
tuple_impls!(1; 0 T0);
tuple_impls!(2; 0 T0 1 T1);
tuple_impls!(3; 0 T0 1 T1 2 T2);
tuple_impls!(4; 0 T0 1 T1 2 T2 3 T3);
tuple_impls!(5; 0 T0 1 T1 2 T2 3 T3 4 T4);
tuple_impls!(6; 0 T0 1 T1 2 T2 3 T3 4 T4 5 T5);
tuple_impls!(7; 0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6);
tuple_impls!(8; 0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7);
tuple_impls!(9; 0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8);
tuple_impls!(10; 0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9);
pub fn init() {
unsafe {
GLOBAL_STDIN = Some(std::io::stdin());
GLOBAL_LOCK = Some(GLOBAL_STDIN.as_ref().unwrap().lock());
}
}
pub fn input<T: Input>() -> T {
T::input()
}