Lukujono

#include <iomanip>
#include<iostream>
#include<sstream>
#include<string>
#include<vector>

#define pb push_back

using namespace std;

vector<string> buffer;

int state[256];

int findClosingBracket(int pos)
{
  int b = 1;
  while (++pos < buffer.size() && b != 0)
  {
    if (buffer[pos] == "(") b++;
    if (buffer[pos] == ")") b--;
  }
  return --pos;
}

int solve(int start, int rep)
{
  int pos;
  for (int i = 0; i < rep; i++)
  {
    pos = start;

    while (pos < buffer.size() && buffer[pos] != ")")
    {
      if (buffer[pos] == "CLEAR")
      {
        // cout << "Performing CLEAR" << endl;
        state[buffer[pos+1][0]] = 0; pos += 2;
      }
      else if (buffer[pos] == "INCREASE")
      {
        // cout << "Performing INCREASE" << endl;
        state[buffer[pos+1][0]]++; pos += 2;
      }
      else if (buffer[pos] == "PRINT")
      {
        // cout << "Performing PRINT" << endl;
        cout << state[buffer[pos+1][0]] << " "; pos += 2;
      }
      else if (buffer[pos] == "REPEAT")
      {
        // cout << "Performing REPEAT" << endl;
        pos = solve(pos + 4, state[buffer[pos+1][0]]);
      }
      else
      {
        cerr << "Error. Position: " << pos << " Token: " << buffer[pos] << endl; exit(1);
      }
    }
  }
  
  if (rep == 0)
    pos = findClosingBracket(start);

  return pos + 1;
}

int main()
{
  string line;
  while (getline(cin, line))
  { 
    string processed = "";
    for (char & c : line)
    {
      if (c == '#')
        break;
      processed += c;
    }

    istringstream iss(processed);

    string token;
    while (iss >> token)
      buffer.pb(token);
  }

  // string token;
  // while (cin >> token)
  //   buffer.pb(token);
  
  // for (int i = 0; i < buffer.size(); i++)
  //   cout << setw(3) << i << " " << buffer[i] << endl;

  solve(0, 1);
}

Test 1 (public)

Verdict: WRONG ANSWER