первое и последнее вхождение

#include <iostream>
using namespace std;

void poisk (int *arr, int left, int right, int znach, int razmer)
{
  int t=-1;

  while (right>=left)
  {
    int i = (right+left)/2;
    int middle = arr[i];

     if (middle == znach)
      {
       t=i;
       while (arr[t]==znach && t!=-1)
       t--;
       cout << t+2 << " ";
       t+=1;
       while (arr[t]==znach && t!=razmer)
       t++;
       cout << t << endl;
       goto printl;
      }
     else if (znach < middle)
        right = i-1;
     else if (znach > middle)
        left = i+1;
  }

printl:
if (t==-1)
cout << "Not found" << endl;
}

int main()
{
  int n=0, m=0, *arr;
  cin >> n;
  arr = new int[n];

  for (int i=0; i<n; i++)
  cin >> arr[i];

  cin >> m;

  int zapros = 0;

  for (int j=0; j<m; j++)
  {
    cin >> zapros;

    if (zapros < arr[0] || zapros > arr[n-1])
     cout << "Not found" << endl;
    else
     poisk (arr, 0, n-1, zapros, n);
 }
}