回溯

src/main/java/cn/whaifree/leetCode/BackTracking/LeetCode131.java

@@ -0,0 +1,71 @@
+package cn.whaifree.leetCode.BackTracking;
+
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+ * @version 1.0
+ * @Author whai文海
+ * @Date 2024/2/10 15:12
+ * @注释
+ */
+public class LeetCode131 {
+
+    @Test
+    public void test() {
+        String abbc = "aaab";
+        new Solution().partition(abbc).forEach(
+                list -> {
+                    System.out.println(list);
+                }
+        );
+    }
+
+    class Solution {
+
+        List<List<String>> res = new ArrayList<>();
+        List<String> path = new ArrayList<>();
+        public List<List<String>> partition(String s) {
+            backTracking(s, 0);
+            return res;
+        }
+
+        /**
+         * 1. 判断回文字符串函数 <br>
+         * 2. 从start开始切割，到i i++<br>
+         * 递归
+         * <img src="https://code-thinking.cdn.bcebos.com/pics/131.%E5%88%86%E5%89%B2%E5%9B%9E%E6%96%87%E4%B8%B2.jpg">
+         *
+         * @param s
+         * @param start
+         */
+        public void backTracking(String s, int start) {
+            if (start >= s.length()) {
+                res.add(new ArrayList<>(path));
+                return;
+            }
+            for (int i = start; i <  s.length(); i++) {
+                if (isPalindrome(s, start, i)) {
+                    String substring = s.substring(start, i + 1);
+                    path.add(substring);
+                    backTracking(s, i + 1);
+                    path.remove(path.size() - 1);
+                }
+            }
+
+        }
+
+        //判断是否是回文串
+        private boolean isPalindrome(String s, int startIndex, int end) {
+            for (int i = startIndex, j = end; i < j; i++, j--) {
+                if (s.charAt(i) != s.charAt(j)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+    }
+}