摘要：
题目链接：https://vjudge.net/contest/241341#problem/G Indonesia, as well as some neighboring Southeast Asian countries and some other East Asian countries, 阅读全文
摘要：
题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=1325 Is It A Tree? Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Tota 阅读全文
摘要：
算法学习：https://blog.csdn.net/qq_16234613/article/details/77431043 http://www.cnblogs.com/chenchengxun/p/4718698.html 题目链接：https://vjudge.net/contest/219 阅读全文