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 ) {
    let resArr = [];
    for (let i of names) {
      if (resArr.indexOf(i) !== -1){
        let k = 1;
        while (resArr.indexOf(`${i}(${k})`) !== -1){
            k += 1;
        }
        resArr.push(`${i}(${k})`);
      } else{
        resArr.push(i);
      }
    }
    return resArr;
  }
  
  module.exports = {
    renameFiles
  };
  