//################# PGM START ##############################################

import java.util.Scanner;
/*
* function to calculate sensitivity or specificity
* sensitivity = true positive rate = the actual positive which are identified correctly
* specificity = true negative rate = the actual negative which are identified correctly
*/

public class Solution {
   public double solution(int A[],int B[],boolean q){
       double result=0;
       double TP=0; //true positive (1 & 1)
       double FP=0; // true negative (0 & 1)
       double FN=0; // false positive (1 & 0)
       double TN=0; //false negative (0 & 0)

       //finding the values of TP,FP,FN,TN
       for(int i=0;i<A.length;i++){
           if(A[i]==1 && B[i]==1){
               TP++;
           }else if(A[i]==1 && B[i]==0){
               FN++;
           }else if(A[i]==0 && B[i]==1){
               FP++;
           }else{
               TN++;
           }
       }
       //if q is false calculate sensitivity
       //else calculate specificity
       if(q==false)
           result=TP/(TP+FN);
       else
           result=TN/(FP+TN);

       return result*100;
   }
   public static void main(String[] args) {
       Scanner s=new Scanner(System.in);
       Solution obj=new Solution();
       boolean q=false;
       int selection;
       //requesting user to enter number of patients
       System.out.print("Enter the number of patients on test is conducted:");
       int N=s.nextInt();

       int A[]=new int[N]; //stores actual data
       int B[]=new int[N]; //stores predicted value

       //requesting user for actual data
       System.out.print("\nEnter the actual values, 0 -> negative & 1 -> possitive:");
       for(int i=0;i<N;i++){
           A[i]=s.nextInt();
       }
      //requesting user for predicted data
       System.out.print("\nEnter the predicted values, 0 -> negative & 1-> possitive:");
       for(int i=0;i<N;i++){
           B[i]=s.nextInt();
       }
       //providing options for user
       System.out.print("Choice\n\n1.Sensitivity\n2.Specificity\n\nEnter your choice:");
       selection=s.nextInt();
       if(selection==1)
           q=false;
       else if(selection==2)
           q=true;
       else
           System.out.println("Wrong entry");

       if(selection==1)
           System.out.println("Sensitivity = "+obj.solution(A,B,q));
       else
           System.out.println("Specificity = "+obj.solution(A,B,q));



   }

}


//############################## PGM END ####################################

OUTPUT
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