#288339 (Rust) No.737 PopCount

提出ソース

結果

問題	No.737 PopCount
ユーザー	sntea
提出日時	2018-09-29 14:26:11
言語	Rust (1.77.0 + proconio)
結果	AC
実行時間	1 ms / 1,000 ms
コード長	7,845 bytes
コンパイル時間	12,977 ms
コンパイル使用メモリ	378,804 KB
実行使用メモリ	5,248 KB
最終ジャッジ日時	2024-10-12 08:15:15
合計ジャッジ時間	13,572 ms
ジャッジサーバーID （参考情報）	judge4 / judge1

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 5,248 KB
testcase_01	AC	1 ms 5,248 KB
testcase_02	AC	1 ms 5,248 KB
testcase_03	AC	1 ms 5,248 KB
testcase_04	AC	1 ms 5,248 KB
testcase_05	AC	1 ms 5,248 KB
testcase_06	AC	1 ms 5,248 KB
testcase_07	AC	1 ms 5,248 KB
testcase_08	AC	1 ms 5,248 KB
testcase_09	AC	1 ms 5,248 KB
testcase_10	AC	1 ms 5,248 KB
testcase_11	AC	1 ms 5,248 KB
testcase_12	AC	1 ms 5,248 KB
testcase_13	AC	1 ms 5,248 KB
testcase_14	AC	1 ms 5,248 KB
testcase_15	AC	1 ms 5,248 KB
testcase_16	AC	1 ms 5,248 KB
testcase_17	AC	1 ms 5,248 KB

権限があれば一括ダウンロードができます

コンパイルメッセージ

warning: unused macro definition: `printf`
   --> src/main.rs:214:18
    |
214 |     macro_rules! printf { ($($arg:tt)*) => (write!(out, $($arg)*).unwrap()); }
    |                  ^^^^^^
    |
    = note: `#[warn(unused_macros)]` on by default

warning: variable does not need to be mutable
   --> src/main.rs:8:13
    |
8   |           let mut s = {
    |               ----^
    |               |
    |               help: remove this `mut`
...
217 | /     input! {
218 | |         n: usize,
219 | |     }
    | |_____- in this macro invocation
    |
    = note: `#[warn(unused_mut)]` on by default
    = note: this warning originates in the macro `input` (in Nightly builds, run with -Z macro-backtrace for more info)

warning: method `pow` is never used
   --> src/main.rs:89:16
    |
83  |         impl $name {
    |         ---------- method in this implementation
...
89  |             fn pow(&self, x: i64) -> $name {
    |                ^^^
...
204 | make_modint!(1_000_000_000 + 7, ModInt);
    | --------------------------------------- in this macro invocation
    |
    = note: `#[warn(dead_code)]` on by default
    = note: this warning originates in the macro `make_modint` (in Nightly builds, run with -Z macro-backtrace for more info)

ソースコード

raw source code

// from https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        let mut s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};

    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };

    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };

    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };

    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };

    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}

#[allow(unused_macros)]
macro_rules! debug { ($x: expr) => { println!("{}: {:?}", stringify!($x), $x) } }
// macro_rules! debug { ($x: expr) => () }

#[allow(dead_code)]
fn show<T>(iter: T) -> String
where
    T: Iterator,
    T::Item: std::fmt::Display
{
    let mut res = iter.fold(String::new(), |sum, e| sum + &format!("{} ", e));
    res.pop();
    res
}

#[allow(unused_imports)]
use std::cmp::{max, min};
#[allow(unused_imports)]
use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, VecDeque};
#[allow(unused_imports)]
use std::collections::btree_map::Entry::{Occupied, Vacant};
#[allow(unused_imports)]
use std::mem::swap;


macro_rules! make_modint {
    ($MOD: expr, $name: ident) => {
        #[derive(Ord, Hash, Eq, PartialOrd, PartialEq)]
        struct $name {
            val: i64,
        }

        impl $name {
            fn new(x: i64) -> $name {
                let x = x%$MOD;
                $name{val: if x < 0 { x+$MOD } else { x }}
            }

            fn pow(&self, x: i64) -> $name {
                let mut res = $name::new(1);
                let mut tmp = x;
                let mut p = *self;
                while tmp != 0 {
                    if tmp&1 == 1 {
                        res *= p;
                    }
                    tmp = tmp>>1;
                    p = p*p;
                }
                res
            }

            fn inv(&self) -> $name {
                assert!(self.val != 0);
                let mut a = self.val;
                let mut b = $MOD;
                let mut u = 1;
                let mut v = 0;
                use std::mem::swap;
                while b != 0 {
                    let t = a/b;
                    a -= t*b;
                    swap(&mut a, &mut b);
                    u -= t*v;
                    swap(&mut u, &mut v);
                }
                $name::new(u)
            }
        }

        impl std::clone::Clone for $name {
            fn clone(&self) -> $name {
                $name{ val: self.val }
            }
        }

        impl std::marker::Copy for $name { }

        impl std::ops::Add for $name {
            type Output = $name;
            fn add(self, y: $name) -> $name {
                let tmp = self.val+y.val;
                $name{val: if tmp >= $MOD {tmp-$MOD} else {tmp}}
            }
        }

        impl std::ops::Neg for $name {
            type Output = $name;
            fn neg(self) -> $name {
                $name::new(self.val)
            }
        }

        impl std::ops::Sub for $name {
            type Output = $name;
            fn sub(self, other: $name) -> $name{
                let tmp = self.val-other.val;
                $name{val: if tmp < 0 {tmp+$MOD} else {tmp}}
            }
        }

        impl std::ops::Mul for $name {
            type Output = $name;
            fn mul(self, y: $name) -> $name {
                $name{val: (self.val*y.val)%$MOD}
            }
        }

        impl std::ops::Div for $name {
            type Output = $name;
            fn div(self, other: $name) -> $name {
                self*other.inv()
            }
        }

        impl std::fmt::Display for $name {
            fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
                write!(f, "{}", self.val)
            }
        }

        impl std::ops::AddAssign for $name {
        fn add_assign(&mut self, other: $name) {
            *self = *self+other;
        }
        }

        impl std::ops::SubAssign for $name {
            fn sub_assign(&mut self, other: $name) {
                *self = *self-other;
            }
        }

        impl std::ops::MulAssign for $name {
            fn mul_assign(&mut self, other: $name) {
                *self = *self*other;
            }
        }

        impl std::ops::DivAssign for $name {
            fn div_assign(&mut self, other: $name) {
                *self = *self*other.inv();
            }
        }

        impl std::fmt::Debug for $name {
            fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
                write!(f, "{}", self.val)
            }
        }
    }
}

make_modint!(1_000_000_000 + 7, ModInt);

fn mint(x: i64) -> ModInt {
    ModInt::new(x)
}

fn main() {
    use std::io::Write;
    let out = std::io::stdout();
    let mut out = std::io::BufWriter::new(out.lock());
    macro_rules! printf { ($($arg:tt)*) => (write!(out, $($arg)*).unwrap()); }
    macro_rules! printfln { () => (writeln!(out).unwrap()); ($($arg:tt)*) => (writeln!(out, $($arg)*).unwrap()); }
    
    input! {
        n: usize,
    }

    let n = n+1;

    // let b = 64;

    let mut cnt = 0;
    let mut nt  =n;
    while nt != 0 {
        cnt += 1;
        nt >>= 1;
    }

    let b = cnt;

    let mut dpc = vec![[mint(0); 2]; b+1];
    dpc[0][0] = mint(1);
    let mut dpv = vec![[mint(0); 2]; b+1];
    for i in (0..b).rev() {
        // debug!(i);

        let mut nexc = vec![[mint(0); 2]; b+1];
        nexc[0] = dpc[0];
        if ((n>>i)&1) == 1 {
            nexc[0][0] = mint(0);
            nexc[0][1] = mint(1);
            for j in 0..b {
                nexc[j+1][0] = dpc[j][0];
                nexc[j+1][1] = dpc[j+1][0] + dpc[j][1] + dpc[j+1][1];
            }
        } else {
            for j in 0..b {
                nexc[j+1][0] = dpc[j+1][0];
                nexc[j+1][1] = dpc[j][1] + dpc[j+1][1];
            }
        }
        
        let nexc = nexc;
        let mut nexv = vec![[mint(0); 2]; b+1];
        if ((n>>i)&1) == 1 {
            for j in 0..b {
                nexv[j+1][0] = 
                    dpc[j][0] + mint(2) * dpv[j][0];
                nexv[j+1][1] = 
                    mint(2) * dpv[j+1][0] + 
                    dpc[j][1] + mint(2) * dpv[j][1] + 
                    mint(2) * dpv[j+1][1]; 
            }
        } else {
            for j in 0..b {
                nexv[j+1][0] = mint(2) * dpv[j+1][0];
                nexv[j+1][1] = 
                    dpc[j][1] + mint(2) * dpv[j][1] +
                    mint(2) * dpv[j+1][1];
            }
        }
        
        dpc = nexc;
        dpv = nexv;

        // dpc.iter().for_each(|e| debug!(e));
        // debug!("");
        // dpv.iter().for_each(|e| debug!(e));
    }

    let ans = 
        dpv.iter()
        .enumerate()
        .map(|(i, &[_, x])| mint(i as i64) * x)
        .fold(mint(0), |x, y| x + y);

    printfln!("{}", ans);
    // let ans = dp0.iter().enumerate()
    //     .map(|(i, v)| mint(i as i64) * v[1])
    //     .fold(mint(0), |x, y| x + y);

    // printfln!("{}", ans);
}

yukicoder

結果

テストケース

コンパイルメッセージ

ソースコード