Lukujono

#include <bits/stdc++.h>
using namespace std;
long long t[26] = {};
struct N
{
  string l;
  int r {};
  vector<N> v;
};
string PS;
void read(N& n, int B)
{ 
  istringstream g;
  if(n.r) g = istringstream(n.l);
#define I(X)string X;if(n.r) g >> X; else while(true) {if((cin >> ws).eof()) return; cin >> X; auto p = X.find("#"); if(p != string::npos) {X = X.substr(0, p); if(cin.peek() != '\n') cin.ignore(1000, '\n');if(!X.size()) continue;} n.l += " "; n.l += X; cin.get(); break;}
  size_t i {};
  while(true)
  {
    I(f);
    if(f == ")")
    {
      n.r = 1;
      return;
    }
    if(f == "PRINT")
    {
      I(x);
      if(!B) cout << t[x[0] - 'A'] << " " << flush;
    }
    else if(f == "INCREASE")
    {
      I(x);
      if(!B) ++t[x[0] - 'A'];
    }
    else if(f == "CLEAR")
    {
      I(x);
      if(!B) t[x[0] - 'A'] = 0;
    }
    if(f == "REPEAT")
    {
      I(x);
      I(ti);
      I(st);
      if(n.v.size() == i) n.v.resize(i + 1);
      if(t[x[0] - 'A'] == 0 || B)
        read(n.v[i], 1);
      else for(long long k = t[x[0] - 'A']; k != 0; --k)
        read(n.v[i], 0);
      ++i;
    }
  }
}
int main()
{
  cin.tie(nullptr);
  cin.sync_with_stdio(false);
  N n;
  read(n, 0);
  cout << flush;
  return 0;
}

Test 1 (public)

Verdict: WRONG ANSWER