Program

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

int main() {
	cin >> n;
	vector<string> OP;
	while (n > 1) {
		if (n == 3) {
			cout << "0\n";
			return 0;
		}
		if (n % 2 != 0 || n == 4) {
			n -= 3;
			OP.push_back("ADD");
		} else {
			n /= 2;
			OP.push_back("MUL");
		}
	}
	reverse(OP.begin(), OP.end());
	cout << OP.size()+1 << '\n';
	for (auto o : OP) {
		cout << o << '\n';
	}
	cout << "END\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

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED

Test 21

Verdict: ACCEPTED

Test 22

Verdict: ACCEPTED

Test 23

Verdict: ACCEPTED

Test 24

Verdict: ACCEPTED

Test 25

Verdict: ACCEPTED

Test 26

Verdict: ACCEPTED

Test 27

Verdict: ACCEPTED

Test 28

Verdict: ACCEPTED

Test 29

Verdict: ACCEPTED

Test 30

Verdict: ACCEPTED