周赛259

src/main/java/com/code/leet/week/Solution259.java

@@ -0,0 +1,109 @@
+package com.code.leet.week;
+
+import java.util.*;
+
+/**
+ * @description:
+ * @author: Administrator
+ * @date: 2021/8/22-10:29
+ */
+public class Solution259 {
+    public static void main(String[] args) {
+        Solution259 solution = new Solution259();
+    }
+
+    public int finalValueAfterOperations(String[] operations) {
+        int x = 0;
+        for (String str : operations) {
+            if (str.contains("+")) {
+                x++;
+            } else {
+                x--;
+            }
+        }
+        return x;
+    }
+
+    public int sumOfBeauties(int[] nums) {
+        int max = nums[0];
+        int min = nums[nums.length - 1];
+        boolean[] bef = new boolean[nums.length];
+        boolean[] aft = new boolean[nums.length];
+        for (int i = 1; i < nums.length - 1; i++) {
+            bef[i] = nums[i] > max;
+            aft[nums.length - 1 - i] = nums[nums.length - 1 - i] < min;
+            max = Math.max(max, nums[i]);
+            min = Math.min(min, nums[nums.length - 1 - i]);
+        }
+        int sum = 0;
+        for (int i = 1; i < nums.length - 1; i++) {
+            if (bef[i] && aft[i]) {
+                sum += 2;
+            } else if (nums[i - 1] < nums[i] && nums[i] < nums[i + 1]) {
+                sum += 1;
+            }
+        }
+        return sum;
+    }
+
+    class DetectSquares {
+
+        Map<Integer, List<Integer>> map;
+        int[][] counts;
+
+        public DetectSquares() {
+            map = new HashMap<>();
+            counts = new int[1001][1001];
+        }
+
+        public void add(int[] point) {
+            List<Integer> list = map.getOrDefault(point[0], new ArrayList<>());
+            if (!list.contains(point[1])) {
+                list.add(point[1]);
+                map.put(point[0], list);
+            }
+            counts[point[0]][point[1]]++;
+        }
+
+        public int count(int[] point) {
+            if (!map.containsKey(point[0])) {
+                return 0;
+            }
+            List<Integer> list = map.get(point[0]);
+            int sum = 0;
+            for (Integer integer : list) {
+                if (point[1] == integer) {
+                    continue;
+                }
+                int[] sxs = new int[]{point[0] - Math.abs(point[1] - integer), point[0] + Math.abs(point[1] - integer)};
+                for (int sx : sxs) {
+                    if (sx >= 0 && sx <= 1000) {
+                        if (!map.containsKey(sx)) {
+                            continue;
+                        }
+                        List<Integer> list1 = map.get(sx);
+                        if (list1.contains(point[1]) && list1.contains(integer)) {
+                            sum += counts[point[0]][integer] * counts[sx][point[1]] * counts[sx][integer];
+                        }
+                    }
+                }
+            }
+            return sum;
+        }
+    }
+
+//    public String longestSubsequenceRepeatedK(String s, int k) {
+//        Map<Character, List<Integer>> map = new HashMap<>();
+//        for (int i = 0; i < s.length(); i++) {
+//            List<Integer> list = map.getOrDefault(s.charAt(i), new ArrayList<>());
+//            list.add(i);
+//            map.put(s.charAt(i), list);
+//        }
+//        for (char ch : map.keySet()) {
+//            if (map.get(ch).size() < k) {
+//                s = s.replace("" + ch, "");
+//            }
+//        }
+//        return null;
+//    }
+}