2021秋季赛

src/main/java/com/code/leet/season/fall2021/contest1/Solution.java

@@ -0,0 +1,38 @@
+package com.code.leet.season.fall2021.contest1;
+
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * @description:
+ * @author: Administrator
+ * @date: 2021/9/25-15:15
+ */
+public class Solution {
+
+    class TreeNode {
+        int val;
+        TreeNode left;
+        TreeNode right;
+
+        TreeNode(int x) {
+            val = x;
+        }
+    }
+
+    Set<Integer> set = new HashSet<>();
+
+    public int numColor(TreeNode root) {
+        dfs(root);
+        return set.size();
+    }
+
+    private void dfs(TreeNode root) {
+        if (root == null) {
+            return;
+        }
+        set.add(root.val);
+        dfs(root.left);
+        dfs(root.right);
+    }
+}

src/main/java/com/code/leet/season/fall2021/contest2/Solution.java

@@ -0,0 +1,64 @@
+package com.code.leet.season.fall2021.contest2;
+
+import com.code.leet.entiy.TwoArray;
+import javafx.util.Pair;
+
+import java.awt.*;
+import java.util.*;
+import java.util.List;
+
+/**
+ * @description:
+ * @author: Administrator
+ * @date: 2021/9/25-16:40
+ */
+public class Solution {
+    public static void main(String[] args) {
+        Solution solution = new Solution();
+        TwoArray terrain = new TwoArray("[[5,0],[0,6]]", true);
+        TwoArray obstacle = new TwoArray("[[0,6],[7,0]]", true);
+        solution.bicycleYard(new int[]{1, 1}, terrain.getArr(), obstacle.getArr());
+    }
+
+    public int[][] bicycleYard(int[] position, int[][] terrain, int[][] obstacle) {
+        List<int[]> result = new ArrayList<>();
+        Queue<int[]> queue = new LinkedList<>();
+        int[] px = new int[]{-1, 1, 0, 0};
+        int[] py = new int[]{0, 0, -1, 1};
+        queue.add(position);
+        int[][] speeds = new int[terrain.length][terrain[0].length];
+        for (int[] ints : speeds) {
+            Arrays.fill(ints, -1);
+        }
+        speeds[position[0]][position[1]] = 1;
+        while (!queue.isEmpty()) {
+            int[] point = queue.poll();
+            int h1 = terrain[point[0]][point[1]];
+            int cur = speeds[point[0]][point[1]];
+            for (int i = 0; i < 4; i++) {
+                int x = point[0] + px[i];
+                int y = point[1] + py[i];
+                if (x < 0 || x >= terrain.length || y < 0 || y >= terrain[0].length) {
+                    continue;
+                }
+                int h2 = terrain[x][y];
+                int o2 = obstacle[x][y];
+                int speed = cur + h1 - h2 - o2;
+                if (speed <= 0 || (speeds[x][y] > 0 && speed >= speeds[x][y])) {
+                    continue;
+                }
+                if (speed == 1) {
+                    result.add(new int[]{x, y});
+                }
+                speeds[x][y] = speed;
+                queue.add(new int[]{x, y});
+            }
+        }
+        int[][] ans = new int[result.size()][2];
+        for (int i = 0; i < result.size(); i++) {
+            ans[i] = result.get(i);
+        }
+        Arrays.sort(ans, (a, b) -> a[0] == b[0] ? a[1] - b[1] : a[0] - b[0]);
+        return ans;
+    }
+}

src/main/java/com/code/leet/season/fall2021/contest3/Solution.java

@@ -0,0 +1,72 @@
+package com.code.leet.season.fall2021.contest3;
+
+import com.code.leet.entiy.TwoArray;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * @description:
+ * @author: Administrator
+ * @date: 2021/9/25-15:16
+ */
+public class Solution {
+    public static void main(String[] args) {
+        Solution solution = new Solution();
+//        TwoArray edges = new TwoArray("[[0,1],[1,2]]", true);
+//        TwoArray plans = new TwoArray("[[2,1],[1,0],[3,0]]", true);
+//        solution.volunteerDeployment(new int[]{1, 16}, 21, edges.getArr(), plans.getArr());
+        TwoArray edges = new TwoArray("[[0,3],[1,3],[4,3],[2,3],[2,5]]", true);
+        TwoArray plans = new TwoArray("[[1,1],[3,3]", true);
+        solution.volunteerDeployment(new int[]{4, 13, 4, 3, 8}, 54, edges.getArr(), plans.getArr());
+    }
+
+    public int[] volunteerDeployment(int[] finalCnt, long totalNum, int[][] edges, int[][] plans) {
+        long[][] result = new long[finalCnt.length + 1][2];
+        result[0][1] = 1;
+        for (int i = 0; i < finalCnt.length; i++) {
+            result[i + 1][0] = finalCnt[i];
+        }
+        Map<Integer, List<Integer>> map = new HashMap<>();
+        for (int[] edge : edges) {
+            List<Integer> list = map.getOrDefault(edge[0], new ArrayList<>());
+            list.add(edge[1]);
+            map.put(edge[0], new ArrayList<>(list));
+            list = map.getOrDefault(edge[1], new ArrayList<>());
+            list.add(edge[0]);
+            map.put(edge[1], new ArrayList<>(list));
+        }
+        for (int i = plans.length - 1; i >= 0; i--) {
+            int index = plans[i][1];
+            if (plans[i][0] == 1) {
+                result[index][0] *= 2;
+                result[index][1] *= 2;
+            } else if (plans[i][0] == 2) {
+                List<Integer> list = map.getOrDefault(index,new ArrayList<>());
+                for (int num : list) {
+                    result[num][0] -= result[index][0];
+                    result[num][1] -= result[index][1];
+                }
+            } else {
+                List<Integer> list = map.getOrDefault(index,new ArrayList<>());
+                for (int num : list) {
+                    result[num][0] += result[index][0];
+                    result[num][1] += result[index][1];
+                }
+            }
+        }
+        int count = 0;
+        for (long[] longs : result) {
+            totalNum -= longs[0];
+            count += longs[1];
+        }
+        int[] nums = new int[result.length];
+        int num = count == 0 ? 0 : (int) (totalNum / count);
+        for (int i = 0; i < result.length; i++) {
+            nums[i] = (int) (result[i][0] + result[i][1] * num);
+        }
+        return nums;
+    }
+}

src/main/java/leetcode/editor/cn/DeleteOperationForTwoStrings.java

@@ -48,9 +48,14 @@ class DeleteOperationForTwoStrings {
             int[][] dp = new int[word1.length() + 1][s2.length() + 1];
             for (int i = 0; i <= word1.length(); i++) {
                 for (int j = 0; j <= s2.length(); j++) {
-                    if (i == 0 || j == 0) continue;
+                    if (i == 0 || j == 0) {
-                    if (word1.charAt(i - 1) == s2.charAt(j - 1)) dp[i][j] = 1 + dp[i - 1][j - 1];
+                        continue;
-                    else dp[i][j] = Math.max(dp[i - 1][j], dp[i][j - 1]);
+                    }
+                    if (word1.charAt(i - 1) == s2.charAt(j - 1)) {
+                        dp[i][j] = 1 + dp[i - 1][j - 1];
+                    } else {
+                        dp[i][j] = Math.max(dp[i - 1][j], dp[i][j - 1]);
+                    }
                 }
             }
             return word1.length() + s2.length() - 2 * dp[word1.length()][s2.length()];