Submission #1482037

---

Source Code Expand

#include <iostream>
#include <vector>
#include <algorithm>
#include <utility>

using namespace std;
using llng = long long;
template<typename T> using v = vector<T>;
template<typename T> using vv = v<v<T> >;

int main() {
    int N; cin >> N;
    string S; cin >> S;

    string acs = "b";
    if (acs == S) {
        cout << 0 << endl;
        return 0;
    }
    for (int i=1; acs.length() < N; i++) {
        if (i%3 == 1) acs = "a" + acs + "c";
        if (i%3 == 2) acs = "c" + acs + "a";
        if (i%3 == 0) acs = "b" + acs + "b";
        if (acs == S) {
            cout << i << endl;
            return 0;
        }
    }
    cout << -1 << endl;
    return 0;
}

Submission Info

Judge Result