摘要：在国际象棋棋盘上放置八个皇后，要求每两个皇后之间不能直接吃掉对方。Input无输入。Output按给定顺序和格式输出所有八皇后问题的解（见Sample Output）。Sample Input Sample Output Hint此题可使用函数递归调用的方法求解。 经典的DFS入门题 核心代码就是一 阅读全文

摘要：A ring is compose of n circles as shown in diagram. Put natural number 1, 2, ..., n into each circle separately, and the sum of numbers in two adjacen 阅读全文

摘要：The GeoSurvComp geologic survey company is responsible for detecting underground oil deposits. GeoSurvComp works with one large rectangular region of 阅读全文