void placeNotesStaff(Note * notes, int nbNotes, int nbStrings)
{
    int i;
    int stringsIdxCur = 2;
    notes[0].stringIdx = stringsIdxCur;
    for (i = 1; i < nbNotes; i++)
    {
    	if (notes[i].value == notes[i-1].value)
    	{
    		notes[i].stringIdx = stringsIdxCur;
    	}

    	if (notes[i].value < notes[i-1].value)
    	{
    		if (stringsIdxCur == 0)
    		{
    			notes[i].stringIdx = stringsIdxCur;
    		}

    		else
    		{
    			notes[i].stringIdx = stringsIdxCur - 1;
    			stringsIdxCur--;
    		}
    	}
    	if (notes[i].value > notes[i-1].value)
    	{
    		if (stringsIdxCur == 4)
    		{
    			notes[i].stringIdx = stringsIdxCur;
    		}

    		else
    		{
    			notes[i].stringIdx = stringsIdxCur + 1;
    			stringsIdxCur++;
    		}
    	}
    }

}