kk

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;
+	}
+}