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// deno-lint-ignore no-explicit-anyexport default interface MyCircularDeque<T = any> { isEmpty: () => boolean; getFront: () => T | number; deleteFront: () => boolean; insertLast: (value: T) => boolean; insertFront: (value: T) => boolean; deleteLast: () => boolean; getRear: () => T | number; isFull: () => boolean; max_size: number;}
// deno-lint-ignore no-explicit-anyexport default function MyCircularDeque<T = any>( k = Infinity,): MyCircularDeque<T> { // console.log('MyCircularDeque', k) if (k < 1) throw Error("k greater than or equal one"); const storage = new Map<bigint, T>(); let min = BigInt(0); let max = BigInt(0); const initial = 0n; // function storage.size { return storage.size } function insertLast(value: T): boolean { if (isFull()) return false;
if (storage.size) { storage.set(max + 1n, value); max++; } else { storage.set(initial, value); max = initial; }
// console.log('insertLast', value, storage) return true; }
function deleteFront(): boolean { if (isEmpty()) return false; else { storage.delete(min); min++; // console.log('deleteFront', storage) if (storage.size === 0) { min = initial; } return true; } // if (storage.has(min)) { // // const r = storage.get(min); // storage.delete(min); // min++; // max-- // console.log('deleteFront', storage) // return true // } else { return false }
// return r as T; }
function getFront(): T | number { // console.log('getFront', storage) if (isEmpty()) return -1; const r = storage.get(min); return r as T; }
function isEmpty(): boolean { return 0 === storage.size; } function insertFront(value: T): boolean { if (isFull()) return false; if (storage.size) { storage.set(min - 1n, value); min--; } else { storage.set(initial, value); min = initial; } // storage.set(min - 1n, value); // min--; // max++ // console.log('insertFront', value, storage) return true; } function deleteLast(): boolean { if (isEmpty()) return false; else { storage.delete(max); max--; // console.log('deleteLast', storage) if (storage.size === 0) { max = initial; } return true; } // if (storage.has(max - 1n + min)) { // // const r = storage.get(min); // storage.delete(max - 1n + min); // max--; // console.log('deleteLast', storage) // return true // } else { return false } } function getRear(): T | number { // console.log('getRear', storage) if (isEmpty()) return -1;
const r = storage.get(max);
return r as T; } function isFull(): boolean { return storage.size >= k; } return { isEmpty, getFront, deleteFront, insertLast, insertFront, deleteLast, getRear, isFull, max_size: k, };}