#501087 (Rust) No.977 アリス仕掛けの摩天楼

提出ソース
結果

問題	No.977 アリス仕掛けの摩天楼
ユーザー	へのく
提出日時	2020-06-22 04:33:32
言語	Rust (1.77.0 + proconio)
結果	AC
実行時間	62 ms / 2,000 ms
コード長	23,283 bytes
コンパイル時間	17,346 ms
コンパイル使用メモリ	405,656 KB
実行使用メモリ	12,756 KB
最終ジャッジ日時	2024-07-03 18:35:18
合計ジャッジ時間	18,875 ms
ジャッジサーバーID （参考情報）	judge1 / judge5
このコードへのチャレンジ
（要ログイン）
テストケース

テストケース表示
入力	結果	実行時間実行使用メモリ
testcase_00	AC	1 ms 6,812 KB
testcase_01	AC	1 ms 6,940 KB
testcase_02	AC	1 ms 6,944 KB
testcase_03	AC	1 ms 6,944 KB
testcase_04	AC	1 ms 6,940 KB
testcase_05	AC	1 ms 6,940 KB
testcase_06	AC	1 ms 6,944 KB
testcase_07	AC	1 ms 6,940 KB
testcase_08	AC	1 ms 6,944 KB
testcase_09	AC	1 ms 6,940 KB
testcase_10	AC	1 ms 6,940 KB
testcase_11	AC	1 ms 6,940 KB
testcase_12	AC	1 ms 6,944 KB
testcase_13	AC	6 ms 6,940 KB
testcase_14	AC	3 ms 6,944 KB
testcase_15	AC	3 ms 6,940 KB
testcase_16	AC	6 ms 6,940 KB
testcase_17	AC	7 ms 6,940 KB
testcase_18	AC	17 ms 6,944 KB
testcase_19	AC	21 ms 9,216 KB
testcase_20	AC	10 ms 6,940 KB
testcase_21	AC	16 ms 6,944 KB
testcase_22	AC	21 ms 6,940 KB
testcase_23	AC	24 ms 6,940 KB
testcase_24	AC	62 ms 12,756 KB
testcase_25	AC	23 ms 6,940 KB
権限があれば一括ダウンロードができます
ソースコード

raw source code
#![allow(unused_imports, non_snake_case)]
#![allow(dead_code)]
use crate::scanner::Scanner;
use crate::{data_structure::union_find::Utree, graph::lowlink::LowLink};
fn main() {
    let mut scan = Scanner::new();
    let n = scan.read::<i32>();
    let mut ut = Utree::new(n);
    let mut edges = list!();
    for _ in 0..n - 1 {
        let u = scan.read::<i32>();
        let v = scan.read::<i32>();
        ut.unite(u, v);
        edges.push((u, v));
    }
    println!(
        "{}",
        if ut.get_group_cnt() >= 3 {
            "Alice"
        } else if ut.get_group_cnt() == 2 {
            let ll = LowLink::new(n, edges);
            if ll.bridges().ilen() > 0 {
                "Alice"
            } else {
                "Bob"
            }
        } else {
            "Bob"
        }
    );
}
pub mod ext {
    pub mod length {
        use std::collections::{BinaryHeap, HashMap, HashSet, VecDeque};
        pub trait LengthI32 {
            fn ilen(&self) -> i32;
        }
        impl<T> LengthI32 for [T] {
            fn ilen(&self) -> i32 {
                self.len() as i32
            }
        }
        impl<T> LengthI32 for Vec<T> {
            fn ilen(&self) -> i32 {
                self.len() as i32
            }
        }
        impl<T> LengthI32 for HashSet<T> {
            fn ilen(&self) -> i32 {
                self.len() as i32
            }
        }
        impl<K, V> LengthI32 for HashMap<K, V> {
            fn ilen(&self) -> i32 {
                self.len() as i32
            }
        }
        impl<T> LengthI32 for VecDeque<T> {
            fn ilen(&self) -> i32 {
                self.len() as i32
            }
        }
        impl<T> LengthI32 for BinaryHeap<T> {
            fn ilen(&self) -> i32 {
                self.len() as i32
            }
        }
    }
    pub mod range {
        use crate::independent::integer::Int;
        use std::cmp::{max, min};
        use std::ops::{Bound, Range, RangeBounds, RangeInclusive};
        pub trait RangeEx<T> {
            fn width(&self) -> T;
            fn empty(&self) -> bool;
            fn contain_range(&self, inner: &Self) -> bool;
            fn separate_range(&self, other: &Self) -> bool;
            type ReturnRange;
            fn overlap(&self, other: &Self) -> Self::ReturnRange;
        }
        impl<T: Int> RangeEx<T> for Range<T> {
            fn width(&self) -> T {
                if self.empty() {
                    T::zero()
                } else {
                    self.end - self.start
                }
            }
            fn empty(&self) -> bool {
                !(self.start < self.end)
            }
            fn contain_range(&self, inner: &Self) -> bool {
                self.start <= inner.start && inner.end <= self.end
            }
            fn separate_range(&self, other: &Self) -> bool {
                self.end <= other.start || other.end <= self.start
            }
            type ReturnRange = Range<T>;
            fn overlap(&self, other: &Self) -> Self::ReturnRange {
                let left = max(self.start, other.start);
                let right = min(self.end, other.end);
                left..right
            }
        }
        impl<T: Int> RangeEx<T> for RangeInclusive<T> {
            fn width(&self) -> T {
                if self.empty() {
                    T::zero()
                } else {
                    *self.end() - *self.start() + T::one()
                }
            }
            fn empty(&self) -> bool {
                !(self.start() <= self.end())
            }
            fn contain_range(&self, inner: &Self) -> bool {
                self.start() <= inner.start() && inner.end() <= self.end()
            }
            fn separate_range(&self, other: &Self) -> bool {
                self.end() <= other.start() || other.end() <= self.start()
            }
            type ReturnRange = RangeInclusive<T>;
            fn overlap(&self, other: &Self) -> Self::ReturnRange {
                let left = *max(self.start(), other.start());
                let right = *min(self.end(), other.end());
                left..=right
            }
        }
        pub trait IntRangeBounds<U: Int>: RangeBounds<U> {
            #[doc = " inclusive"]
            fn lower_bound(&self, lower_bound: U) -> U {
                match self.start_bound() {
                    Bound::Included(x) => max(lower_bound, *x),
                    Bound::Excluded(x) => max(lower_bound, *x + U::one()),
                    Bound::Unbounded => lower_bound,
                }
            }
            #[doc = " exclusive"]
            fn upper_bound(&self, upper_bound: U) -> U {
                match self.end_bound() {
                    Bound::Included(x) => min(upper_bound, *x + U::one()),
                    Bound::Excluded(x) => min(upper_bound, *x),
                    Bound::Unbounded => upper_bound,
                }
            }
            fn to_harfopen(&self, lb: U, ub: U) -> Range<U> {
                self.lower_bound(lb)..self.upper_bound(ub)
            }
        }
        impl<T: ?Sized, U: Int> IntRangeBounds<U> for T where T: RangeBounds<U> {}
    }
}
pub mod graph {
    pub mod lowlink {
        use crate::{arraylist::List, list};
        use std::{cmp::min, collections::HashSet};
        pub struct LowLink {
            g: List<List<i32>>,
            edges: List<(i32, i32)>,
            used_v: List<bool>,
            used_e: HashSet<(i32, i32)>,
            ord: List<i32>,
            lowlink: List<i32>,
            k: i32,
        }
        impl LowLink {
            pub fn new(n: i32, edges: List<(i32, i32)>) -> LowLink {
                let mut g = list ! ( list ! ( ) ; n );
                for &(u, v) in &edges {
                    g[u].push(v);
                    g[v].push(u);
                }
                let mut ll = LowLink {
                    g,
                    edges,
                    used_v: list ! ( false ; n ),
                    used_e: HashSet::new(),
                    ord: list ! ( 0 ; n ),
                    lowlink: list ! ( 0 ; n ),
                    k: 0,
                };
                ll.dfs(0);
                ll
            }
            fn dfs(&mut self, v: i32) {
                self.used_v[v] = true;
                self.ord[v] = self.k;
                self.lowlink[v] = self.k;
                self.k += 1;
                for u in self.g[v].clone() {
                    if !self.used_v[u] {
                        self.used_e.insert((v, u));
                        self.dfs(u);
                        self.lowlink[v] = min(self.lowlink[v], self.lowlink[u]);
                    } else if !self.used_e.contains(&(u, v)) {
                        self.lowlink[v] = min(self.lowlink[v], self.ord[u]);
                    }
                }
            }
            pub fn is_bridge(&self, mut u: i32, mut v: i32) -> bool {
                if self.ord[u] > self.ord[v] {
                    std::mem::swap(&mut u, &mut v);
                }
                self.ord[u] < self.lowlink[v]
            }
            pub fn bridges(&self) -> List<(i32, i32)> {
                let mut ret = list!();
                for &(u, v) in &self.edges {
                    if self.is_bridge(u, v) {
                        ret.push((u, v));
                    }
                }
                ret
            }
            pub fn is_arti(&self, v: i32) -> bool {
                for &u in &self.g[v] {
                    if self.ord[v] < self.ord[u] && self.ord[u] <= self.lowlink[v] {
                        return true;
                    }
                }
                false
            }
            pub fn arti_points(&self) -> List<i32> {
                (0..self.g.ilen()).filter(|v| self.is_arti(*v)).collect()
            }
        }
    }
}
pub mod scanner {
    use crate::arraylist::List;
    use std::io::{stdin, BufReader, Bytes, Read, Stdin};
    use std::str::FromStr;
    pub struct Scanner {
        buf: Bytes<BufReader<Stdin>>,
    }
    impl Scanner {
        pub fn new() -> Scanner {
            Scanner {
                buf: BufReader::new(stdin()).bytes(),
            }
        }
        pub fn read_next<T: FromStr>(&mut self) -> Option<T> {
            let token = self
                .buf
                .by_ref()
                .map(|c| c.unwrap() as char)
                .skip_while(|c| c.is_whitespace())
                .take_while(|c| !c.is_whitespace())
                .collect::<String>();
            token.parse::<T>().ok()
        }
        pub fn read<T: FromStr>(&mut self) -> T {
            self.read_next().unwrap()
        }
        pub fn readn<T: FromStr>(&mut self, n: i32) -> List<T> {
            (0..n).map(|_| self.read::<T>()).collect()
        }
        pub fn chars(&mut self) -> List<char> {
            self.read::<String>().chars().collect()
        }
    }
}
pub mod data_structure {
    pub mod union_find {
        use crate::arraylist::List;
        use crate::ext::length::LengthI32;
        pub struct Utree {
            n: i32,
            par: List<i32>,
            rank: List<i32>,
            size: List<i32>,
        }
        impl Utree {
            pub fn new(n: i32) -> Utree {
                Utree {
                    n,
                    par: (0..n).collect(),
                    rank: List::init(0, n),
                    size: List::init(1, n),
                }
            }
            pub fn find(&mut self, x: i32) -> i32 {
                if self.par[x] == x {
                    x
                } else {
                    let parent = { self.par[x] };
                    let ret = self.find(parent);
                    self.par[x] = ret;
                    ret
                }
            }
            pub fn unite(&mut self, mut x: i32, mut y: i32) {
                x = self.find(x);
                y = self.find(y);
                if x == y {
                    return;
                };
                if self.rank[x] < self.rank[y] {
                    self.par[x] = y;
                    self.size[y] += self.size[x];
                } else {
                    self.par[y] = x;
                    self.size[x] += self.size[y];
                    if self.rank[x] == self.rank[y] {
                        self.rank[x] += 1;
                    }
                }
            }
            pub fn is_same(&mut self, mut x: i32, mut y: i32) -> bool {
                x = self.find(x);
                y = self.find(y);
                x == y
            }
            pub fn get_size(&mut self, mut x: i32) -> i32 {
                x = self.find(x);
                self.size[x]
            }
            #[doc = " グループ数(root頂点数)"]
            pub fn get_group_cnt(&mut self) -> i32 {
                let mut hset = std::collections::HashSet::new();
                for i in 0..self.n {
                    hset.insert(self.find(i));
                }
                hset.ilen()
            }
        }
    }
}
pub mod arraylist {
    use crate::{ext::range::IntRangeBounds, independent::integer::Int};
    use std::fmt::Formatter;
    use std::iter::FromIterator;
    use std::ops::{Index, IndexMut, RangeBounds};
    use std::slice::Iter;
    #[derive(Clone, PartialEq, Eq)]
    pub struct List<T> {
        pub vec: Vec<T>,
    }
    impl<T> List<T> {
        #[inline]
        pub fn new() -> List<T> {
            List { vec: vec![] }
        }
        #[inline]
        pub fn init(init: T, n: i32) -> List<T>
        where
            T: Clone,
        {
            List {
                vec: vec![init; n as usize],
            }
        }
        #[inline]
        pub fn from_vec(vec: Vec<T>) -> List<T> {
            List { vec }
        }
        #[inline]
        pub fn ilen(&self) -> i32 {
            self.vec.len() as i32
        }
        #[inline]
        pub fn iter(&self) -> Iter<'_, T> {
            self.vec.iter()
        }
        #[inline]
        pub fn push(&mut self, item: T) {
            self.vec.push(item);
        }
        #[inline]
        pub fn sort(&mut self)
        where
            T: Ord,
        {
            self.vec.sort();
        }
        #[inline]
        pub fn reverse(&mut self) {
            self.vec.reverse();
        }
        #[inline]
        pub fn sort_by<F>(&mut self, compare: F)
        where
            F: FnMut(&T, &T) -> std::cmp::Ordering,
        {
            self.vec.sort_by(compare)
        }
        #[inline]
        pub fn sort_by_key<K, F>(&mut self, compare: F)
        where
            F: FnMut(&T) -> K,
            K: Ord,
        {
            self.vec.sort_by_key(compare)
        }
        #[inline]
        pub fn first(&self) -> Option<&T> {
            self.vec.first()
        }
        #[inline]
        pub fn last(&self) -> Option<&T> {
            self.vec.last()
        }
        #[inline]
        pub fn pop(&mut self) -> Option<T> {
            self.vec.pop()
        }
        #[inline]
        pub fn swap(&mut self, i: i32, j: i32) {
            self.vec.swap(i as usize, j as usize);
        }
        #[inline]
        pub fn append(&mut self, mut other: Self) {
            self.vec.append(&mut other.vec);
        }
        #[inline]
        pub fn extend(&mut self, other: impl Iterator<Item = T>) {
            self.vec.extend(other);
        }
        #[inline]
        pub fn mirror(&self) -> std::iter::Cloned<Iter<T>>
        where
            T: Clone,
        {
            self.iter().cloned()
        }
        #[inline]
        pub fn map<B, F>(&self, f: F) -> List<B>
        where
            T: Clone,
            F: FnMut(T) -> B,
        {
            self.mirror().map(f).collect()
        }
        #[inline]
        pub fn filter<P>(&self, predicate: P) -> List<T>
        where
            T: Clone,
            P: FnMut(&T) -> bool,
        {
            self.mirror().filter(predicate).collect()
        }
        #[inline]
        pub fn filter_map<B, F>(&self, f: F) -> List<B>
        where
            T: Clone,
            F: FnMut(T) -> Option<B>,
        {
            self.mirror().filter_map(f).collect()
        }
        #[inline]
        pub fn any<P>(&self, predicate: P) -> bool
        where
            P: FnMut(&T) -> bool,
        {
            self.iter().any(predicate)
        }
        #[inline]
        pub fn all<P>(&self, predicate: P) -> bool
        where
            P: FnMut(&T) -> bool,
        {
            self.iter().all(predicate)
        }
        #[inline]
        pub fn sum(&self) -> T
        where
            T: Int,
        {
            self.iter().cloned().fold(T::zero(), |acc, x| acc + x)
        }
        #[inline]
        pub fn enumerate(&self) -> List<(i32, T)>
        where
            T: Clone,
        {
            self.mirror()
                .enumerate()
                .map(|p| (p.0 as i32, p.1))
                .collect()
        }
        #[inline]
        pub fn find<P>(&self, mut predicate: P) -> Option<&T>
        where
            P: FnMut(&T) -> bool,
        {
            self.iter().find(|x| predicate(*x))
        }
        #[inline]
        pub fn index_of<P>(&self, mut predicate: P) -> Option<i32>
        where
            P: FnMut(&T) -> bool,
        {
            self.iter()
                .enumerate()
                .find(|&(_i, x)| predicate(x))
                .map(|p| p.0 as i32)
        }
        #[inline]
        pub fn to<B: FromIterator<T>>(&self) -> B
        where
            T: Clone,
        {
            self.mirror().collect()
        }
        #[inline]
        pub fn min(&self) -> Option<&T>
        where
            T: Ord,
        {
            self.iter().min()
        }
        #[inline]
        pub fn max(&self) -> Option<&T>
        where
            T: Ord,
        {
            self.iter().max()
        }
        #[inline]
        pub fn argmin(&self) -> Option<i32>
        where
            T: Ord,
        {
            let item = self.iter().min()?;
            self.iter()
                .enumerate()
                .find(|p| p.1 == item)
                .map(|p| p.0 as i32)
        }
        #[inline]
        pub fn argmax(&self) -> Option<i32>
        where
            T: Ord,
        {
            let item = self.iter().max()?;
            self.iter()
                .enumerate()
                .find(|p| p.1 == item)
                .map(|p| p.0 as i32)
        }
        #[inline]
        pub fn part<U>(&self, range: U) -> List<T>
        where
            T: Clone,
            U: RangeBounds<i32>,
        {
            List::from_vec(
                self.vec[range.lower_bound(0) as usize..range.upper_bound(self.ilen()) as usize]
                    .to_vec(),
            )
        }
        #[inline]
        pub fn first_exn(&self) -> &T {
            self.first().unwrap()
        }
        #[inline]
        pub fn last_exn(&self) -> &T {
            self.last().unwrap()
        }
        #[inline]
        pub fn pop_exn(&mut self) -> T {
            self.pop().unwrap()
        }
        #[inline]
        pub fn min_exn(&self) -> &T
        where
            T: Ord,
        {
            self.min().unwrap()
        }
        #[inline]
        pub fn max_exn(&self) -> &T
        where
            T: Ord,
        {
            self.max().unwrap()
        }
        #[inline]
        pub fn argmin_exn(&self) -> i32
        where
            T: Ord,
        {
            self.argmin().unwrap()
        }
        #[inline]
        pub fn argmax_exn(&self) -> i32
        where
            T: Ord,
        {
            self.argmax().unwrap()
        }
        #[inline]
        pub fn find_exn<P>(&self, predicate: P) -> &T
        where
            P: FnMut(&T) -> bool,
        {
            self.find(predicate).unwrap()
        }
        #[inline]
        pub fn index_of_exn<P>(&self, predicate: P) -> i32
        where
            P: FnMut(&T) -> bool,
        {
            self.index_of(predicate).unwrap()
        }
    }
    impl<T> Index<i32> for List<T> {
        type Output = T;
        #[inline]
        fn index(&self, index: i32) -> &Self::Output {
            if cfg!(debug_assertions) {
                self.vec.index(index as usize)
            } else {
                unsafe { self.vec.get_unchecked(index as usize) }
            }
        }
    }
    impl<T> IndexMut<i32> for List<T> {
        #[inline]
        fn index_mut(&mut self, index: i32) -> &mut Self::Output {
            if cfg!(debug_assertions) {
                self.vec.index_mut(index as usize)
            } else {
                unsafe { self.vec.get_unchecked_mut(index as usize) }
            }
        }
    }
    impl<T> FromIterator<T> for List<T> {
        fn from_iter<U: IntoIterator<Item = T>>(iter: U) -> Self {
            let mut vec = vec![];
            for i in iter {
                vec.push(i);
            }
            List { vec }
        }
    }
    impl<T> IntoIterator for List<T> {
        type Item = T;
        type IntoIter = std::vec::IntoIter<T>;
        fn into_iter(self) -> std::vec::IntoIter<T> {
            self.vec.into_iter()
        }
    }
    impl<'a, T> IntoIterator for &'a List<T> {
        type Item = &'a T;
        type IntoIter = Iter<'a, T>;
        fn into_iter(self) -> Iter<'a, T> {
            self.vec.iter()
        }
    }
    impl<T: std::fmt::Display> std::fmt::Display for List<T> {
        fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
            write!(
                f,
                "{}",
                self.iter()
                    .map(|x| format!("{}", x))
                    .collect::<Vec<_>>()
                    .join(" ")
            )
        }
    }
    impl<T: std::fmt::Debug> std::fmt::Debug for List<T> {
        fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
            write!(
                f,
                "[{}]",
                self.iter()
                    .map(|x| format!("{:?}", x))
                    .collect::<Vec<_>>()
                    .join(", ")
            )
        }
    }
    impl<T> From<Vec<T>> for List<T> {
        fn from(vec: Vec<T>) -> Self {
            Self::from_vec(vec)
        }
    }
    impl<T: Clone> From<&[T]> for List<T> {
        fn from(slice: &[T]) -> Self {
            slice.iter().cloned().collect()
        }
    }
    #[macro_export]
    macro_rules ! list { ( ) => { $ crate :: arraylist :: List :: new ( ) } ; ( $ v : expr ; $ a : expr ) => { $ crate :: arraylist :: List :: init ( $ v , $ a ) } ; ( $ v : expr ; $ a : expr ; $ ( $ rest : expr ) ;+ ) => { $ crate :: arraylist :: List :: init ( list ! ( $ v ; $ ( $ rest ) ;+ ) , $ a ) } ; }
}
pub mod independent {
    pub mod integer {
        pub trait Int:
            std::ops::Add<Output = Self>
            + std::ops::Sub<Output = Self>
            + std::ops::Mul<Output = Self>
            + std::ops::Div<Output = Self>
            + std::ops::Rem<Output = Self>
            + std::ops::AddAssign
            + std::ops::SubAssign
            + std::ops::MulAssign
            + std::ops::DivAssign
            + std::hash::Hash
            + PartialEq
            + Eq
            + PartialOrd
            + Ord
            + Copy
        {
            fn to_u8(&self) -> u8;
            fn to_u16(&self) -> u16;
            fn to_u32(&self) -> u32;
            fn to_u64(&self) -> u64;
            fn to_u128(&self) -> u128;
            fn to_i8(&self) -> i8;
            fn to_i16(&self) -> i16;
            fn to_i32(&self) -> i32;
            fn to_i64(&self) -> i64;
            fn to_i128(&self) -> i128;
            fn to_usize(&self) -> usize;
            fn to_isize(&self) -> isize;
            fn from_u8(x: u8) -> Self;
            fn from_u16(x: u16) -> Self;
            fn from_u32(x: u32) -> Self;
            fn from_u64(x: u64) -> Self;
            fn from_u128(x: u128) -> Self;
            fn from_i8(x: i8) -> Self;
            fn from_i16(x: i16) -> Self;
            fn from_i32(x: i32) -> Self;
            fn from_i64(x: i64) -> Self;
            fn from_i128(x: i128) -> Self;
            fn from_usize(x: usize) -> Self;
            fn from_isize(x: isize) -> Self;
            fn zero() -> Self;
            fn one() -> Self;
            fn next(&self) -> Self {
                *self + Self::one()
            }
        }
        macro_rules ! impl_integer_functions { ( $ selftpe : ident , $ ( $ tofn : ident , $ fromfn : ident , $ tpe : ident ) ,* ) => { $ ( fn $ tofn ( & self ) -> $ tpe { * self as $ tpe } fn $ fromfn ( x : $ tpe ) -> Self { x as $ selftpe } ) * } ; }
        macro_rules ! impl_integer { ( $ ( $ tpe : ident ) ,* ) => { $ ( impl Int for $ tpe { impl_integer_functions ! ( $ tpe , to_u8 , from_u8 , u8 , to_u16 , from_u16 , u16 , to_u32 , from_u32 , u32 , to_u64 , from_u64 , u64 , to_u128 , from_u128 , u128 , to_i8 , from_i8 , i8 , to_i16 , from_i16 , i16 , to_i32 , from_i32 , i32 , to_i64 , from_i64 , i64 , to_i128 , from_i128 , i128 , to_usize , from_usize , usize , to_isize , from_isize , isize ) ; fn zero ( ) -> Self { 0 } fn one ( ) -> Self { 1 } } ) * } ; }
        impl_integer!(u8, u16, u32, u64, u128, i8, i16, i32, i64, i128, usize, isize);
    }
}
yukicoder

結果

テストケース

ソースコード
