C. Nephren gives a riddle time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output What are you doing at the end of the world? Are you busy? Will you save us? Nephren is playing a game with little…
又掉分了0 0. A. Scarborough Fair time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Are you going to Scarborough Fair? Parsley, sage, rosemary and thyme. Remember me to one who lives there. He on…
D. Alyona and a tree time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Alyona has a tree with n vertices. The root of the tree is the vertex 1. In each vertex Alyona wrote an positive intege…
C. Journey time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are n cities and n - 1 roads in the Seven Kingdoms, each road connects two cities and we can reach any city from any other…
C. Kefa and Park time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Kefa decided to celebrate his first big salary by going to the restaurant. He lives by an unusual park. The park is a roote…
B. Chtholly's request time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output — Thanks a lot for today. — I experienced so many great things. — You gave me memories like dreams... But I have to le…
