<pre class="shiki github-dark shaku"><code>/** * @param {string} str * @returns {string} */function uncompress(str) { var _str = str function parseStr(str) { const strarr = str.replace(')','').split('(') const times = parseInt(strarr[0]) var arr = [] arr.length = times+1 return arr.join(strarr[1]) } function handleStr () { const reg = /\d+\(([^()]+)\)/g const arr = _str.match(reg) if(arr &amp;&amp; arr.length&gt;0){ for(let i=0;i&lt;arr.length;i++){ _str = _str.replaceAll(arr[i],parseStr(arr[i])) } handleStr() } } handleStr() return _str}console.log(uncompress('2(BFE1(dev))3(2(lover))'))</code></pre>

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Given a compressed string, return its original form. For example. uncompress('3(ab)') // 'ababab'uncompress('3(ab2(c))') // 'abccabccabcc' 1. a number…