题目来自此
思路见代码随想录合并区间

def main():
    import ast
    meetings = ast.literal_eval(input())
    meetings.sort(key=lambda x:x[0])
    result = [meetings[0]]
    for meeting in meetings:
        if meeting[0] <= result[-1][1]:
            result[-1][1] = meeting[1]
        else:
            result.append(meeting)
    print(result)
if __name__ == "__main__":
    main()