摘要：Problem Jamie has recently found undirected weighted graphs with the following properties very interesting: The graph is connected and contains exactl 阅读全文

摘要：Problem You have m = n·k wooden staves. The i-th stave has length ai. You have to assemble n barrels consisting of k staves each, you can use any k st 阅读全文

摘要：Problem The king is left alone on the chessboard. In spite of this loneliness, he doesn't lose heart, because he has business of national importance. 阅读全文

摘要：Problem Vasya has found a strange device. On the front panel of a device there are: a red button, a blue button and a display showing some positive in 阅读全文