void move(vector<int> &src, vector<int> &tar) {
    int pan = src.back();
    src.pop_back();
    tar.push_back(pan);
}
void dfs(int n, vector<int> &src, vector<int> &buf, vector<int> &tar) {
    if (n == 1) {
        move(src, tar);
        return;
    }
    dfs(n - 1, src, tar, buf);
    move(src, tar);
    dfs(n - 1, buf, src, tar);
}
void solveHanota(vector<int> &A, vector<int> &B, vector<int> &C) {
    int n = A.size();
    dfs(n, A, B, C);
}