first_occur.cpp

#include<bits/stdc++.h>
usingnamespacestd;

#definelllonglong
#definepb push_back
#definemod1000000007
#defineendl'\n'
voidfindFirstAndLast(int arr[], int n, int x)
{
int first = -1, last = -1;
for (int i = 0; i < n; i++) {
if (x != arr[i])
continue;
if (first == -1)
 first = i;
 last = i;
 }
if (first != -1)
 cout << "First Occurrence = " << first
 << "\nLast Occurrence = " << last;
else
 cout << "Not Found";
}
intmain(){
 cin.tie(0)->sync_with_stdio(0);
int arr[]={1,2,4,4,4,6};
int n=sizeof(arr)/sizeof(int);
int key;
 key=4;
findFirstAndLast(arr,n,key);


return0;
}