data[0] = data[1]  = 1; 
		int	sum = 1;
		cnt = 1; 
		while ( sum <500000000 ) 
		{			
				cnt++; 
				for (int j = 0; j<cnt; j++ ) data[cnt] += data[j] * data[cnt-1-j]; 
				sum += data[cnt]; 			
		}