IGAME solution

#include <iostream>
#include <vector>

using namespace std;

int main()
{
    int mx = 1001, cr=0, m, n, p, q, T;;
    vector<vector<int> > memo(mx, vector<int>(mx,1));
    vector<bool> used(mx, false);
    for (int i=1; i<mx; i++) if (!used[i] && i+cr < mx)
    {
        cr++;
        memo[i][i+cr] = memo[i+cr][i] = 0;
        used[i] = used[i+cr] = true;
    }
    cin >> T;
    for (int z=0; z<T; z++)
    {
        cin >> m >> n >> p >> q;
        m-=p;
        n-=q;
        cout << (memo[n][m]==1?"Alice":"Bob") << endl;
    }
}