struct floor
{
    int h, k, v;
}sz[201];

int main()
{
    int n, a, b;
    cin >> n >> a >> b;
    for(int i=1; i<=n; i++)
    {
        scanf("%d", &sz[i].k);
        sz[i].h = i;
        sz[i].v = -1;
    }

    queue<floor> Q;
............................
}

error: type/value mismatch at argument 1 in template parameter list for 'template<class _Tp, class _Sequence> class std::queue'

note: expected a type, got 'std::floor'

error: template argument 2 is invalid