Summary of the second group competition of vector.

HDU's fourth warm-up match is also the second group competition of vector.

The late arrival of Victoria caused us to have a bad start (is that why we failed today? Haha)

I read question I at the opening, and the result was not very good. In addition, I had a problem with the sample, and gave up and switched to G. Ted soon found question B relatively simple, decisive, someone will immediately pass B. Question B is a labyrinth problem, solving the minimum number of steps. Due to the suspension of the bridge, ordinary BFS cannot be solved, or it is very easy to TLE, ted B first experienced the TLE, and Victoria also returned. After G had no results, I began to look at J. I compared the water question. After wa, I paid attention to the details before AC. At this time, Ted thought of the priority queue to optimize the search (positive solution, worship). Victoria started to study g and wrote it by hand. Then there was a tragedy. I read question D, decisive classic switch problem, the original thought Gaussian elimination of YUAN Water, the result is an important failure in this game, Ted B's question fell into the tragedy of MLE, crazy debugging, I soon finished writing D and submitted wa. At this time, the tragedy began. How did the naked Gaussian deyuan + enumeration get wa? I began to submit it frantically, making unnecessary sacrifices. After the continuous wa, it seriously affected the mood of the competition, and Ted's B had a hard time. As question B is stuck, question D is also stuck, and other questions are suddenly absent, vector is in a tragedy. The second team competition ended with two questions:

Ted's question B is always debugging by myself, and the team is not able to help me. The question d I wrote is also self-tangle, because the priority queue of question B is better than that of Ted, I have only been in touch with the Gaussian elimination element of question D. The result is tragic. In the debugging and testing stage, the team should discuss more and find problems faster.

The other problem is that the vector is still quite young. In the continuous unfavorable circumstances of the opening, the mentality is not well grasped, so that the question cannot be answered at the end of the time. The vector should have the spirit of not giving up, even in the last hour, you must firmly believe that you can solve the problem. Maybe there is still hope to see the first question or study the ninth question at the end.

Vector continues to cheer up, The Invitational Tournament of the armed forces ......