檢查單詞中字母不合情況的重複，並刪除

原文鏈接：https://www.nowcoder.com/questionTerminal/42852fd7045c442192fa89404ab42e92?orderByHotValue=1&page=1&onlyReference=false

    res = []
    for e in s:
        if len(res) < 2:
            res.append(e)
            continue
        if len(res) >= 2:
            if e == res[-1] and e == res[-2]:
                continue
        if len(res) >= 3:
            if e == res[-1] and res[-2] == res[-3]:
                continue
        res.append(e)
        
    print("".join(res))