int MaxSubSum3(int *arr, int len) {

	int i;

	long long MaxSum = 0;

	long long CurSum = 0;

	for(int i = 0; i < len; i ++) {

		CurSum += arr[i];

		if(CurSum > MaxSum)

			MaxSum = CurSum;

		if(CurSum < 0)

			CurSum = 0;

	}

	return MaxSum;

}