Merkkijono

#include <iostream>

using namespace std;

int main() {
    int k = 0;
    bool* s = new bool[1 << 17];
    string c = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    string d;
    cin >> d;
    while (d != c) {
        char a = d[0];
        if (d[0] > d[1]) {
            s[k++] = true;
            d[0] = d[1];
            d[1] = a;
        } else {
            s[k++] = false;
            d = d.substr(1);
            d[25] = a;
        }
    }
    cout << k << "\n";
    for (int i = 0; i < k; i++) {
        if (s[k]) {
            cout << "SWAP\n";
        } else {
            cout << "MOVE\n";
        }
    }
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::substr: __pos (which is 1) > this->size() (which is 0)

Test 3

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::substr: __pos (which is 1) > this->size() (which is 0)

Test 4

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::substr: __pos (which is 1) > this->size() (which is 0)

Test 5

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::substr: __pos (which is 1) > this->size() (which is 0)