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Update the book based on the revised second edition (#1014)

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* Revised the book

* Update the book with the second revised edition

* Revise base on the manuscript of the first edition
This commit is contained in:
Yudong Jin
2023-12-28 18:06:09 +08:00
committed by GitHub
parent 19dde675df
commit f68bbb0d59
261 changed files with 643 additions and 647 deletions
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codes/go/chapter_backtracking/n_queens.go
+2 -2
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@@ -18,10 +18,10 @@ func backtrack(row, n int, state *[][]string, res *[][][]string, cols, diags1, d
}
// 遍历所有列
for col := 0; col < n; col++ {
// 计算该格子对应的主对角线和副对角线
// 计算该格子对应的主对角线和次对角线
diag1 := row - col + n - 1
diag2 := row + col
// 剪枝：不允许该格子所在列、主对角线、副对角线上存在皇后
// 剪枝：不允许该格子所在列、主对角线、次对角线上存在皇后
if !(*cols)[col] && !(*diags1)[diag1] && !(*diags2)[diag2] {
// 尝试：将皇后放置在该格子
(*state)[row][col] = "Q"