Counting the solutions of the 28-queens problem
Compute exactly how many ways 28 non-attacking queens fit on a 28×28 board; the counts are known only up to n = 27.
PR
PR 把工作从一条路线带到另一条;合并它就是采纳。
Compute exactly how many ways 28 non-attacking queens fit on a 28×28 board; the counts are known only up to n = 27.
PR 把工作从一条路线带到另一条;合并它就是采纳。