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Cyber_Orientation.java
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Cyber_Orientation.java
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.StringTokenizer;
public class Cyber_Orientation {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer(br.readLine(), " ");
int count = 0;
String startValue = st.nextToken();
String endValue = st.nextToken();
String finalValue = st.nextToken();
String value = br.readLine();
HashSet<String> user = new HashSet<>();
HashSet<String> attendance = new HashSet<>();
while(!value.isEmpty() && value!= null) {
st = new StringTokenizer(value, " ");
String timeValue = st.nextToken();
String userName = st.nextToken();
if(timeValue.compareTo(startValue) <=0) {
user.add(userName);
}
else if(timeValue.compareTo(endValue) >= 0 && timeValue.compareTo(finalValue) <= 0) {
attendance.add(userName);
}
value = br.readLine();
}
for(String s : user) {
if(attendance.contains(s)) {
count++;
}
}
System.out.println(count);
}
}