pub struct Acc2D<T: Num + Copy> {
    pub H: usize,
    pub W: usize,
    pub S: Vec<Vec<T>>,
}
Expand description

2次元累積和

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§H: usize§W: usize§S: Vec<Vec<T>>

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impl<T> Acc2D<T>where T: Num + Copy + TryFrom<usize> + Mul, <T as TryFrom<usize>>::Error: Debug,

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pub fn new(array: &Vec<Vec<T>>) -> Self

2次元配列から累積和を初期化する

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pub fn sum<R, C>(&self, row: R, col: C) -> Twhere R: RangeBounds<usize> + Debug, C: RangeBounds<usize> + Debug,

累積和の値を求める

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pub fn sum_cyclic( &self, top: usize, left: usize, height: usize, width: usize ) -> T

トーラスとみなしたときの和を求める

Args
  • (top,left):左上の座標
  • (height,width):取得する区間

Auto Trait Implementations§

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impl<T> RefUnwindSafe for Acc2D<T>where T: RefUnwindSafe,

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impl<T> Send for Acc2D<T>where T: Send,

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impl<T> Sync for Acc2D<T>where T: Sync,

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impl<T> Unpin for Acc2D<T>where T: Unpin,

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impl<T> UnwindSafe for Acc2D<T>where T: UnwindSafe,

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

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fn vzip(self) -> V