結果

問題 No.1092 modular arithmetic
ユーザー fukafukatanifukafukatani
提出日時 2020-10-24 19:51:39
言語 Rust
(1.77.0)
結果
AC  
実行時間 76 ms / 2,000 ms
コード長 5,682 bytes
コンパイル時間 958 ms
コンパイル使用メモリ 148,120 KB
実行使用メモリ 4,384 KB
最終ジャッジ日時 2023-09-28 20:42:36
合計ジャッジ時間 5,491 ms
ジャッジサーバーID
（参考情報） 		judge14 / judge15
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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
4,380 KB
testcase_01 AC 9 ms
4,376 KB
testcase_02 AC 1 ms
4,376 KB
testcase_03 AC 28 ms
4,380 KB
testcase_04 AC 23 ms
4,376 KB
testcase_05 AC 24 ms
4,380 KB
testcase_06 AC 18 ms
4,380 KB
testcase_07 AC 22 ms
4,376 KB
testcase_08 AC 24 ms
4,376 KB
testcase_09 AC 22 ms
4,376 KB
testcase_10 AC 19 ms
4,376 KB
testcase_11 AC 22 ms
4,384 KB
testcase_12 AC 18 ms
4,376 KB
testcase_13 AC 4 ms
4,380 KB
testcase_14 AC 4 ms
4,376 KB
testcase_15 AC 2 ms
4,380 KB
testcase_16 AC 3 ms
4,380 KB
testcase_17 AC 5 ms
4,376 KB
testcase_18 AC 29 ms
4,380 KB
testcase_19 AC 17 ms
4,380 KB
testcase_20 AC 30 ms
4,380 KB
testcase_21 AC 23 ms
4,376 KB
testcase_22 AC 28 ms
4,376 KB
testcase_23 AC 66 ms
4,376 KB
testcase_24 AC 20 ms
4,380 KB
testcase_25 AC 49 ms
4,380 KB
testcase_26 AC 58 ms
4,376 KB
testcase_27 AC 10 ms
4,380 KB
testcase_28 AC 48 ms
4,376 KB
testcase_29 AC 76 ms
4,376 KB
testcase_30 AC 49 ms
4,380 KB
testcase_31 AC 7 ms
4,380 KB
testcase_32 AC 46 ms
4,380 KB
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コンパイルメッセージ
warning: unused variable: `n`
  --> Main.rs:20:13
   |
20 |     let (p, n) = (v[0], v[1] as usize);
   |             ^ help: if this is intentional, prefix it with an underscore: `_n`
   |
   = note: `#[warn(unused_variables)]` on by default

warning: 1 warning emitted

ソースコード

diff # 

#![allow(unused_imports)]
use std::cmp::*;
use std::collections::*;
use std::io::Write;
use std::ops::Bound::*;

#[allow(unused_macros)]
macro_rules! debug {
    ($($e:expr),*) => {
        #[cfg(debug_assertions)]
        $({
            let (e, mut err) = (stringify!($e), std::io::stderr());
            writeln!(err, "{} = {:?}", e, $e).unwrap()
        })*
    };
}

fn main() {
    let v = read_vec::<i64>();
    let (p, n) = (v[0], v[1] as usize);
    let a = read_vec::<i64>();
    let s = read::<String>();

    Modulo::set_modulus(p);
    let mut cur = Modulo(a[0]);

    for (i, ch) in s.chars().enumerate() {
        if ch == '+' {
            cur += a[i + 1];
        } else if ch == '-' {
            cur -= a[i + 1];
        } else if ch == '*' {
            cur *= a[i + 1];
        } else if ch == '/' {
            cur *= Modulo(a[i + 1]).inv();
        }
    }
    println!("{}", cur);
}

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>()
        .split_whitespace()
        .map(|e| e.parse().ok().unwrap())
        .collect()
}

#[derive(Clone, Copy, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
struct Modulo(i64);
static mut MODULUS: i64 = 1000_000_000 + 7;
impl Modulo {
    fn set_modulus(m: i64) {
        unsafe {
            MODULUS = m;
        }
    }
    fn get_modulus() -> i64 {
        unsafe { MODULUS }
    }
    fn new(x: i64) -> Modulo {
        let m = Modulo::get_modulus();
        if x < 0 {
            Modulo(x % m + m)
        } else if x < m {
            Modulo(x)
        } else {
            Modulo(x % m)
        }
    }
    fn pow(self, p: i64) -> Modulo {
        if p == 0 {
            Modulo(1)
        } else {
            let mut t = self.pow(p / 2);
            t *= t;
            if p & 1 == 1 {
                t *= self;
            }
            t
        }
    }
    fn inv(self) -> Modulo {
        self.pow(Modulo::get_modulus() - 2)
    }
}
impl std::fmt::Display for Modulo {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        self.0.fmt(f)
    }
}
impl std::ops::AddAssign for Modulo {
    fn add_assign(&mut self, other: Modulo) {
        let m = Modulo::get_modulus();
        self.0 += other.0;
        if self.0 >= m {
            self.0 -= m;
        }
    }
}
impl std::ops::MulAssign for Modulo {
    fn mul_assign(&mut self, other: Modulo) {
        let m = Modulo::get_modulus();
        self.0 *= other.0;
        self.0 %= m;
    }
}
impl std::ops::SubAssign for Modulo {
    fn sub_assign(&mut self, other: Modulo) {
        let m = Modulo::get_modulus();
        self.0 += m - other.0;
        if self.0 >= m {
            self.0 -= m;
        }
    }
}
macro_rules! impl_modulo_ops {
    ($imp:ident, $method:ident, $assign_imp:ident, $assign_method:ident) => {
        impl<'a> std::ops::$assign_imp<&'a Modulo> for Modulo {
            fn $assign_method(&mut self, other: &'a Modulo) {
                std::ops::$assign_imp::$assign_method(self, *other);
            }
        }
        impl std::ops::$imp for Modulo {
            type Output = Modulo;
            fn $method(self, other: Modulo) -> Modulo {
                let mut x = self;
                std::ops::$assign_imp::$assign_method(&mut x, other);
                x
            }
        }
        impl<'a> std::ops::$imp<Modulo> for &'a Modulo {
            type Output = Modulo;
            fn $method(self, other: Modulo) -> Modulo {
                std::ops::$imp::$method(*self, other)
            }
        }
        impl<'a> std::ops::$imp<&'a Modulo> for Modulo {
            type Output = Modulo;
            fn $method(self, other: &'a Modulo) -> Modulo {
                std::ops::$imp::$method(self, *other)
            }
        }
        impl<'a, 'b> std::ops::$imp<&'b Modulo> for &'a Modulo {
            type Output = Modulo;
            fn $method(self, other: &'b Modulo) -> Modulo {
                std::ops::$imp::$method(*self, *other)
            }
        }
        impl std::ops::$assign_imp<i64> for Modulo {
            fn $assign_method(&mut self, other: i64) {
                std::ops::$assign_imp::$assign_method(self, Modulo::new(other));
            }
        }
        impl<'a> std::ops::$assign_imp<&'a i64> for Modulo {
            fn $assign_method(&mut self, other: &'a i64) {
                std::ops::$assign_imp::$assign_method(self, *other);
            }
        }
        impl std::ops::$imp<i64> for Modulo {
            type Output = Modulo;
            fn $method(self, other: i64) -> Modulo {
                let mut x = self;
                std::ops::$assign_imp::$assign_method(&mut x, other);
                x
            }
        }
        impl<'a> std::ops::$imp<&'a i64> for Modulo {
            type Output = Modulo;
            fn $method(self, other: &'a i64) -> Modulo {
                std::ops::$imp::$method(self, *other)
            }
        }
        impl<'a> std::ops::$imp<i64> for &'a Modulo {
            type Output = Modulo;
            fn $method(self, other: i64) -> Modulo {
                std::ops::$imp::$method(*self, other)
            }
        }
        impl<'a, 'b> std::ops::$imp<&'b i64> for &'a Modulo {
            type Output = Modulo;
            fn $method(self, other: &'b i64) -> Modulo {
                std::ops::$imp::$method(*self, *other)
            }
        }
    };
}
impl_modulo_ops!(Add, add, AddAssign, add_assign);
impl_modulo_ops!(Mul, mul, MulAssign, mul_assign);
impl_modulo_ops!(Sub, sub, SubAssign, sub_assign);
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