Range Start and End Position

                    Range Start and End Position

N integers are passed as input. X which is an integer is also passed as the input. The program must print the start S and end E positions of X in these N integers. -1 must be printed as the start and end positions when X is not present in these N numbers.

Input Format:
The first line contains N.
The second line contains N integer values separated by a space.
The third line contains X.

Output Format:
The first line contains S and E separated by a space.

Boundary Conditions:
2 <= N <= 1000
-9999 <= X <= 9999

Example Input/Output 1:
Input:
5
1 2 3 1 3
3

Output:
3 5

Example Input/Output 2:
Input:
7
10 20 10 20 30 40 50
60

Output:

-1 -1 

Code:

#include <iostream>

using namespace std;

int main(int argc, char** argv)

{

int n,key,i,first=0,last=0,j;

cin>>n;

int arr[n];

for(i=0;i<n;i++)

    cin>>arr[i];

cin>>key;

for(i=0,j=n-1;i<n;i++,j--)

{

    if(arr[i]==key)

        first=i+1;

    if(arr[j]==key)

        last=j+1;

}

if(first==0)

    cout<<"-1 -1";

else

    cout<<last<<" "<<first;

}

Please do comment If u have any Queries!