夏午晴天

摘要： Misha hacked the Codeforces site. Then he decided to let all the users change their handles. A user can now change his handle any number of times. But 阅读全文

摘要： 1 #include 2 3 using namespace std; 4 //upper_bound(a, arr + 10, 7) - a; 5 int search(int *a, int l, int r, int key) 6 { 7 int mid; 8 while(l key) r = mid - 1; 14 } 15 retu... 阅读全文

摘要： SPY The National Intelligence Council of X Nation receives a piece of credible information that Nation Y will send spies to steal Nation X’s confident 阅读全文

摘要： Let the Balloon Rise Contest time again! How excited it is to see balloons floating around. But to tell you a secret, the judges' favorite time is gue 阅读全文

摘要： Andy's First Dictionary Andy, 8, has a dream - he wants to produce his very own dictionary. This is not an easy task for him, as the number of words t 阅读全文