D. Broken BST http://codeforces.com/problemset/problem/797/D time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Let T be arbitrary binary tree — tree, every vertex of which has no more than tw…
You received as a gift a very clever robot walking on a rectangular board. Unfortunately, you understood that it is broken and behaves rather strangely (randomly). The board consists of N rows and M columns of cells. The robot is initially at some ce…