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Alice wrote an exam containing N true or false questions (i.e. questions whose answer is either true or false). Each question is worth 1 mark and there is no negative marking in the examination. Alice scored K marks out of N.
Bob wrote the same exam but he marked each and every question as the opposite of what Alice did, i.e, for whichever questions Alice marked true
, Bob marked false
and for whichever questions Alice marked false
, Bob marked true
.
Determine the score of Bob.
For each test case, output on a new line the score of Bob.
Input: 3
1 1
50 0
100 76
Output: 0
50
24
Test case 1: There was one question in the exam and Alice answered it correctly. This means that Bob will surely answer it incorrectly. Therefore Bob’s score is zero.
Test case 2: Alice answered all the questions incorrectly, and so Bob will surely answer all the questions correctly. Therefore Bob’s score is 50.
#include<iostream>
using namespace std;
int main()
{
int t;
cin>>t;
if(t>=1&&t<=2000)
{
while(t--)
{
int n,k;
cin>>n>>k;
cout<<(n-k)<<endl;
}
}
return 0;
}
import java.util.*;
import java.lang.*;
import java.io.*;
class Codechef
{
public static void main (String[] args) throws java.lang.Exception
{
Scanner scn= new Scanner(System.in);
int T= scn.nextInt();
for(int i=0; i<T;i++){
int K= scn.nextInt();
int N= scn.nextInt();
System.out.println(K-N);
}
}
}
t=int(input())
for i in range(t):
n,k=(map(int, input().split()))
print(n-k)
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