Create 2276.Count-Integers-in-Intervals.cpp

Author: wisdompeak

Heap/2276.Count-Integers-in-Intervals/2276.Count-Integers-in-Intervals.cpp

@@ -0,0 +1,52 @@
+class CountIntervals {
+ map<int,int>Map;
+ int ret = 0;
+public:
+ CountIntervals() {
+ 
+ }
+ 
+ void add(int left, int right) 
+ {
+ unordered_set<int>temp;
+
+ int start = left;
+ auto iter = Map.lower_bound(left); 
+ if (iter!=Map.begin() && prev(iter)->second>=start)
+ {
+ iter = prev(iter);
+ temp.insert(iter->first);
+ start = min(start, iter->first); 
+ }
+
+ int end = right;
+ iter = Map.lower_bound(left); 
+ if (iter!=Map.begin())
+ end = max(end, prev(iter)->second); 
+ while (iter!=Map.end() && iter->first<=end)
+ {
+ temp.insert(iter->first);
+ end = max(end, iter->second);
+ iter = next(iter);
+ }
+ 
+ for (int x: temp)
+ {
+ ret -= Map[x]-x+1;
+ Map.erase(x);
+ }
+ ret += end-start+1;
+ Map[start] = end;
+ }
+ 
+ int count() {
+ return ret;
+ }
+};
+
+/**
+ * Your CountIntervals object will be instantiated and called as such:
+ * CountIntervals* obj = new CountIntervals();
+ * obj->add(left,right);
+ * int param_2 = obj->count();
+ */