Tony is busy writing his university exams, and thus lacks creativity. So he's making you write what you've already done in the last DWITE round, but differently. Instead of semiprimes, this time you're interested in numbers with 3 unique prime factors.
The input file DATA1.txt will contain five integers, one per line. 1 <= N <= 1000.
The output file OUT1.txt will contain five lines, stating if the supplied integers were "valid" or "not". Use the exact string output, all lower case, without quotes.
Note: You're looking for unique factors. For example, 12 has three prime factors: 2, 2, 3. But it's only two unique numbers: 2 and 3. Thus 12 is not what is asked for.
10 12 15 30 105
not not not valid valid