In order to make ACM ICPC participants gain confidence and interest, I select out 20 easy and interesting problems.The web address is http://acm.zju.edu.cn.是什么意思_In order to make ACM ICPC participants gain confidence and interest, I select out 20 easy and interesting problems.The web address is http://acm.zju.edu.cn.在线翻译_英语_读音_用法_例句