今夕

摘要： Description George took sticks of the same length and cut them randomly until all parts became at most 50 units long. Now he wants to return sticks to 阅读全文

摘要： 数独（深搜）数据最弱版本（poj 2676) Description Sudoku is a very simple task. A square table with 9 rows and 9 columns is divided to 9 smaller squares 3x3 as shown 阅读全文