Program

#include <bits/stdc++.h>

using namespace std;

#define rep(i, a, b) for(int i = a; i < int(b); ++i)
#define trav(a, v) for(auto& a : v)
#define all(x) x.begin(), x.end()
#define sz(x) (int)(x).size()
#define D(x) cerr << #x << " = " << x << endl

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;

int main() {
	ll n;
	cin>>n;
	//queue<int> q;
	//map<int,int>
	vector<bool> p;
	while(true){
		if(n<2)
			break;
		if(n==4){
			p.push_back(true);
			n-=3;
			continue;
		}
		if(n%2 == 0){
			p.push_back(false);
			n/=2;
		}else{
			p.push_back(true);
			n-=3;
		}
	}
	if(n==1){
		cout<<p.size()+1<<endl;
		for(int i = p.size()-1;i>=0;--i){
			if(p[i]==false)
				cout<<"MUL"<<endl;
			else
				cout<<"ADD"<<endl;
		}
		cout<<"END"<<endl;
	}else{
		cout<<0<<endl;
	}
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 1

Verdict: ACCEPTED

Test 7

Group: 1

Verdict: ACCEPTED

Test 8

Group: 1

Verdict: ACCEPTED

Test 9

Group: 1

Verdict: ACCEPTED

Test 10

Group: 1

Verdict: ACCEPTED

Test 11

Group: 2

Verdict: ACCEPTED

Test 12

Group: 2

Verdict: ACCEPTED

Test 13

Group: 2

Verdict: ACCEPTED

Test 14

Group: 2

Verdict: ACCEPTED

Test 15

Group: 2

Verdict: ACCEPTED

Test 16

Group: 2

Verdict: ACCEPTED

Test 17

Group: 2

Verdict: ACCEPTED

Test 18

Group: 2

Verdict: ACCEPTED

Test 19

Group: 2

Verdict: ACCEPTED

Test 20

Group: 2

Verdict: ACCEPTED

Test 21

Group: 3

Verdict: ACCEPTED

Test 22

Group: 3

Verdict: ACCEPTED

Test 23

Group: 3

Verdict: ACCEPTED

Test 24

Group: 3

Verdict: ACCEPTED

Test 25

Group: 3

Verdict: ACCEPTED

Test 26

Group: 3

Verdict: ACCEPTED

Test 27

Group: 3

Verdict: ACCEPTED

Test 28

Group: 3

Verdict: ACCEPTED

Test 29

Group: 3

Verdict: ACCEPTED

Test 30

Group: 3

Verdict: ACCEPTED