摘要：
1356. Something EasierTime limit: 1.0 secondMemory limit: 64 MB“How do physicists define prime numbers? Very easily: prime numbers are the number 2 and all the odd numbers greater than 2. They may show that this definition corresponds to the mathematical one: 3 is prime, 5 is prime, 7 is prime… 9? 9 阅读全文
