Ohjelma

#include <iostream>
#include <vector>
using namespace std;

typedef long long ll;

const int MAX = 1000001;

int a[MAX];
string c[MAX];
int p[MAX];

int main() {
  ll n;
  cin >> n;
  if (n%3 == 0) {
    cout << "0\n";
    return 0;
  }
  a[1] = 1;
  int ans = 0;
  for (ll i = 1; i <= n; i++) {
    int s = a[i];
    if (s == 0) continue;
    if (i == n) {
      ans = s;
      break;
    }
    if (i+3 < MAX && (a[i+3] == 0 || a[i+3] > s+1)) {
      a[i+3] = s+1;
      c[i+3] = "ADD";
      p[i+3] = i;
    }
    if (i*2 < MAX && (a[i*2] == 0 || a[i*2] > s+1)) {
      a[i*2] = s+1;
      c[i*2] = "MUL";
      p[i*2] = i;
    }
  }
  cout << ans << "\n";
  vector<string> cmds;
  for (int i = n; i > 1;) {
    cmds.push_back(c[i]);
    i = p[i];
  }
  for (int i = cmds.size()-1; i >= 0; i--) {
    cout << cmds[i] << "\n";
  }
  cout << "END\n";
}

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: RUNTIME ERROR

Test 25

Group: 3

Verdict: RUNTIME ERROR

Test 26

Group: 3

Verdict: ACCEPTED

Test 27

Group: 3

Verdict: RUNTIME ERROR

Test 28

Group: 3

Verdict: RUNTIME ERROR

Test 29

Group: 3

Verdict: ACCEPTED

Test 30

Group: 3

Verdict: RUNTIME ERROR