摘要:
Follow up for N-Queens problem.Now, instead outputting board configurations, return the total number of distinct solutions.跟N-Queen的考虑方式完全一样,NP问题,用循环递... 阅读全文
摘要:
The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other.Given an integern, return all di... 阅读全文
摘要:
Write a program to solve a Sudoku puzzle by filling the empty cells.Empty cells are indicated by the character '.'.You may assume that there will be o... 阅读全文