摘要：
假如出现SS 那么表示Spring，如果出现SX的话，就表示WINTER，末尾出现S不管 1 #include 2 #include 3 #include 4 #include 5 #include 6 #include 7 #include 8 #include 9 #include... 阅读全文
摘要：
Problem J Permutation CountingDexter considers a permutation of first N natural numbers good if it doesn't have x and x+1 appearing consecutively, whe... 阅读全文