@@ -230,15 +230,15 @@ public boolean exist(char[][] board, String word) {
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231231[ N皇后] ( https://leetcode-cn.com/problems/n-queens/ )
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233- <div align =" center " ><img src =" https://gitee .com/duhouan /ImagePro/raw/master/java-notes/leetcode/backtrack//backtrack_22.png " width =" 600 " /></div >
233+ <div align =" center " ><img src =" https://github .com/DuHouAn /ImagePro/raw/master/java-notes/leetcode/backtrack//backtrack_22.png " width =" 600 " /></div >
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235- <div align =" center " ><img src =" https://gitee .com/duhouan /ImagePro/raw/master/java-notes/leetcode/backtrack//backtrack_23.png " width =" 600 " /></div >
235+ <div align =" center " ><img src =" https://github .com/DuHouAn /ImagePro/raw/master/java-notes/leetcode/backtrack//backtrack_23.png " width =" 600 " /></div >
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237237- 思路:
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239- <div align =" center " ><img src =" https://gitee .com/duhouan /ImagePro/raw/master/java-notes/leetcode/backtrack//backtrack_24.png " width =" 600 " /></div >
239+ <div align =" center " ><img src =" https://github .com/DuHouAn /ImagePro/raw/master/java-notes/leetcode/backtrack//backtrack_24.png " width =" 600 " /></div >
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241- <div align =" center " ><img src =" https://gitee .com/duhouan /ImagePro/raw/master/java-notes/leetcode/backtrack//backtrack_25.png " width =" 600 " /></div >
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243243在第 i 行放上皇后,判断是否其他地方能够放皇后的情况:
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@@ -250,15 +250,15 @@ dia1[1] =true 就表示 [0,1]和[1,0] 位置不能放皇后。
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251251对角线1总共有 (2* n-1) 条;m 与 i 、 j 的关系:m=i+j。
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253- <div align =" center " ><img src =" https://gitee .com/duhouan /ImagePro/raw/master/java-notes/leetcode/backtrack//backtrack_26.png " width =" 600 " /></div >
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255255(3)对角线2:dai2[ m] 表示第 m 条对角线被2占用,如 dai2[ 0] =true 表示[ 0,3] 位置不能放皇后,
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257257dai2[ 2] =true 则表示 [ 0,2] 和 [ 1,3] 不能放皇后,
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259259对角线2总共有(2* n-1)条;m 与 i、j 关系:m=i-j+n-1。
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261- <div align =" center " ><img src =" https://gitee .com/duhouan /ImagePro/raw/master/java-notes/leetcode/backtrack//backtrack_27.png " width =" 600 " /></div >
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263263``` java
264264private List<List<String > > res;
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