We are OIers

Stars Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 32858   Accepted: 14352 Description Astronomers often examine star maps where stars are represented b

Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:    In the figure, each node is labeled with an integer from {1, 2,...,16

Description You have N integers, A1, A2, ... , AN. You need to deal with two kinds of operations. One type of operation is to add some given number to each number in a given interval. The other is