kk

src/main/java/com/dota/arr/_2656/Solution.java

@@ -0,0 +1,16 @@
+package com.dota.arr._2656;
+
+/**
+ * 2656. K 个元素的最大和
+ */
+class Solution {
+    public int maximizeSum(int[] nums, int k) {
+        var max = nums[0];
+        for (int num : nums) {
+            if (num>max) {
+                max = num;
+            }
+        }
+        return max * k + k*(k-1)/2;
+    }
+}

src/main/java/com/dota/rank/Solution.java

@@ -0,0 +1,5 @@
+package com.dota.rank;
+
+public class Solution {
+
+}

src/main/java/com/dota/treeMap/Solution.java

@@ -0,0 +1,41 @@
+package com.dota.treeMap;
+
+import java.util.Map;
+import java.util.TreeMap;
+
+public class Solution {
+
+}
+
+/**
+ * 2276. 统计区间中的整数数目
+ */
+
+class CountIntervals {
+	TreeMap<Integer, Integer> map = new TreeMap<>();
+	int cnt = 0;
+
+	public CountIntervals() {
+
+	}
+
+	public void add(int left, int right) {
+		Map.Entry<Integer, Integer> inte = map.floorEntry(right);
+		while (inte != null && inte.getValue() >= left) {
+			int l = inte.getKey();
+			int r = inte.getValue();
+			left = Math.min(l, left);
+			right = Math.max(r, right);
+			cnt -= r - l + 1;
+			map.remove(l);
+			inte = map.floorEntry(right);
+		}
+
+		cnt += (right - left + 1);
+		map.put(left, right);
+	}
+
+	public int count() {
+		return cnt;
+	}
+}