text: const { NotImplementedError } = require("../extensions/index.js");
  
  /**
   * There's a list of file, since two files cannot have equal names,
   * the one which comes later will have a suffix (k),
   * where k is the smallest integer such that the found name is not used yet.
   *
   * Return an array of names that will be given to the files.
   *
   * @param {Array} names
   * @return {Array}
   *
   * @example
   * For input ["file", "file", "image", "file(1)", "file"],
   * the output should be ["file", "file(1)", "image", "file(1)(1)", "file(2)"]
   *
   */
  function renameFiles(names) {
    const namesObj = {};
  
    return names.map((name) => {
      if (namesObj[name]) {
        name += `(${namesObj[name]++})`;
      }
      namesObj[name] = 1;
      return name;
    });
  }
  
  module.exports = {
    renameFiles,
  };
  