for (int A = 1; A < N - 2; A++) {
    int ProfitA = Sum(array[0...A-1]);
    for (int B = 1; B < N - 1; B++) {
        int ProfitB = Sum(array[A...A+B-1]);
        int ProfitC = Sum(array[A+B...N-1]);
    }
}