I have tried with multiple test cases, both positive and negative, but still hidden test cases are not passing.
#include <iostream>
using namespace std;
bool search(int arr[], int n, int x){
for(int i = 0; i < n; i++){
if(arr[i] == x){
return true;
}
}
return false;
}
int find_index(int arr[], int n, int x){
for(int i = 0; i < n; i++){
if(arr[i] == x){
return i;
}
}
return -1;
}
int main() {
int n;
cin >> n;
int arr[n];
for(int i = 0; i < n; i++){
cin >> arr[i];
}
int k;
cin >> k;
int seen_arr[n];
for(int i = 0; i < n; i++){
seen_arr[i] = 0;
}
int index = 0;
for(int i = 0; i < n; i++){
int x = k - arr[i];
if(search(seen_arr, index, x) && (find_index(arr, n, x) != i)){
cout << min(x, arr[i]) << " and " << max(x, arr[i]) << endl;
}
else{
seen_arr[index] = arr[i];
index++;
}
}
return 0;
}