Forth

#include <bits/stdc++.h>

int main() {
    int x;
    std::cin >> x;
    std::cout << 2 * (x - 1) + 3 << '\n';
    std::vector<std::string> OP;
    for (int i = 1; i <= x; ++i) std::cout << "DUP ";
    for (int i = 1; i < x; ++i) std::cout << "+ ";
    std::cout << "SWAP DROP\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