Number-of-students-doing-homework-at-a-given-time.cpp

class Solution {
public:
    int busyStudent(vector<int>& startTime, vector<int>& endTime, int queryTime) {
        int counter=0;
        for(int i =0; i < startTime.size(); i++)
        {
            if(startTime[i] <= queryTime && endTime[i] >= queryTime)
                counter++;
        }
        return counter; 
    }
};