reigns的博客

B. Grow The Tree time limit per test 2 seconds memory limit per test 512 megabytes input standard input output standard output Gardener Alexey teaches competitive programming to high school s...

F. Chips time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output There are????nchips arranged in a circle, numbered from11to????n. Initial...