Forth

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

int x,k;
int main() {
    cin.tie(0)->sync_with_stdio(0);
    cout.tie(0);
    cin >> x;
    if (x==1) {
        cout << "2\nDUP\nDROP\n";
        return 0;
    }
    cout << 2*x-2 << '\n';
    for(int i=1;i<x;++i) cout<<"DUP\n";
    for(int i=1;i<x;++i) cout<<"+\n";
}

Test 1

Verdict: ACCEPTED

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