Debugging Tool.cpp

#include <bits/stdc++.h>
using namespace std;
 
#define debug(...) cerr << "[" << #__VA_ARGS__ << "] =>", dbg_out(__VA_ARGS__)
template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template < typename T_container, typename T = typename enable_if < !is_same<T_container, string>::value, typename T_container::value_type >::type >
ostream & operator<<(ostream &os, const T_container &v) { os << '{'; string sep; for (const T &x : v) os << sep << x, sep = ", "; return os << '}'; }
void dbg_out() { cerr << " , "; }
template<typename Up, typename... Down> void dbg_out(Up U, Down... D) { cerr << ' ' << U; dbg_out(D...); }
#define   endline_debug cerr << endl;   


void solve() {
  int a; cin >> a;
  vector<int> v = {1,2,3,4};
  for(int i = 0; i < a; i++) {
    int x = 2;
    debug(i);
    debug(x);
     
     
    endline_debug
    int ans =12;
    debug(v);
    debug(ans);
    endline_debug
    endline_debug

  }
}
int32_t main()
{
 
    int t = 1;
    while (t--)
        solve();
    return 0;
}