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  1. class Library {
  2.     constructor() {
  3.         this.books = {}; 
  4.     }
  5. }
  6.  
  7. class AddBook extends Library {
  8.     update(params) {
  9.         const [name, yearPublished, copies] = params;
  10.         if (this.books[name]) {
  11.             this.books[name].countOfBooks += parseInt(copies);
  12.         } else {
  13.             this.books[name] = {
  14.                 name: name,
  15.                 yearPublished: parseInt(yearPublished),
  16.                 countOfBooks: parseInt(copies),
  17.                 countOfBooksIssued: 0
  18.             };
  19.         }
  20.         return JSON.stringify(this.books[name]);
  21.     }
  22. }
  23.  
  24. class IssueBook extends Library {
  25.     update(params) {
  26.         const [name, yearPublished] = params;
  27.         if (this.books[name] && this.books[name].countOfBooksIssued < this.books[name].countOfBooks) {
  28.             this.books[name].countOfBooksIssued++;
  29.             return "true";
  30.         }
  31.         return "false";
  32.     }
  33. }
  34.  
  35. class ReturnBook extends Library {
  36.     update(params) {
  37.         const [name, yearPublished, issueDate, returnDate] = params;
  38.         const book = this.books[name];
  39.         if (!book) return "0";
  40.  
  41.         const issueTime = new Date(issueDate).getTime();
  42.         const returnTime = new Date(returnDate).getTime();
  43.         const diffDays = Math.floor((returnTime - issueTime) / (1000 * 60 * 60 * 24));
  44.  
  45.         if (diffDays <= 30) {
  46.             book.countOfBooksIssued--;
  47.             return "0";
  48.         }
  49.  
  50.         const overdueDays = diffDays - 30;
  51.         const weeksOverdue = Math.floor(overdueDays / 7);
  52.         let fine = overdueDays + Math.sqrt(weeksOverdue);
  53.         if (overdueDays > 180) fine += 50;
  54.  
  55.         book.countOfBooksIssued--;
  56.         return Math.floor(fine).toString();
  57.     }
  58. }
  59.  
  60. function processInput(inputString, ab, ib, rb) {
  61.     const params = inputString.split(" ");
  62.     if (params.length === 3) {
  63.         return ab.update(params);
  64.     } else if (params.length === 2) {
  65.         return ib.update(params);
  66.     } else if (params.length === 4) {
  67.         return rb.update(params);
  68.     }
  69. }
  70.  
  71. function main() {
  72.     const fs = require('fs');
  73.     const inputString = fs.readFileSync(process.env.INPUT_PATH, 'utf-8').trim().split('\n');
  74.     const queries = parseInt(inputString[0], 10);
  75.     const ab = new AddBook();
  76.     const ib = new IssueBook();
  77.     const rb = new ReturnBook();
  78.     let content = '';
  79.     for (let i = 1; i <= queries; i++) {
  80.         const query = inputString[i];
  81.         content += processInput(query, ab, ib, rb) + '\n';
  82.     }
  83.     const ws = fs.createWriteStream(process.env.OUTPUT_PATH);
  84.     ws.write(content);
  85.     ws.end();
  86. }
  87.  
Success #stdin #stdout 0.03s 16784KB
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https://ideone.com/4EuJ6c
language:
JavaScript (SMonkey 60.2.3)
created:
13 days ago
visibility:
public

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