text: #include <bits/stdc++.h>
  #include <boost/format.hpp>
  
  #include "temp/print_type.hpp"
  
  using namespace std;
  
  int main() {
      constexpr int N = 100;
      int* a = new int[N];
      int* mid = a + 50;
      int* end = a + N;
      auto oh = end - mid;
      delete[] a;
      cout << type_name<decltype(oh)>() << endl;
      cout << oh << endl;
      return 0;
  }
  
  