Forth

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

#ifdef LOCAL
#include "debug.hpp"
#else
#define debug(...) 0xffff
#endif

int main() {
  ios_base::sync_with_stdio(0); cin.tie(0);
  int x; cin>>x;

  // [1]
  // DUP [1, 1]
  // DUP [1, 1, 1]
  // 

  if (x == 1) return cout << "0\n", 0;

  // keep adding till it's x
  vector<string> ops = {"DUP"};

  int cur = 1;
  while (cur < x) {
    ops.push_back("DUP");
    ops.push_back("ROT");
    ops.push_back("+");
    ops.push_back("SWAP");
    cur++;
  }

  ops.push_back("DROP");

  cout << ops.size() <<"\n";
  for (auto s : ops) cout << s << " ";
}

Test 1

Verdict: WRONG ANSWER

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED