Forth

#include <bits/stdc++.h>
 
using namespace std;
 
int main() {
    int x;
    cin>>x;
    if (x == 1) {
        cout<<"2"<<endl<<"DUP DROP"<<endl;
    } else {
        cout<<(x + x - 2)<<endl;
        for (int i = 1; i < x; i++) cout<<"DUP ";
        for (int i = 1; i < x; i++) cout<<"+ ";
        cout<<endl;
    }
}

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