21:计算10000以下所有亲和数之和: Let d(n) be defined as the sum of proper divisors of n (numbers less than n which divide evenly into n). If d(a) b and d(b) a, where a b, then a and b are an amicable pair and each of a and b are cal…
已有一个OCI计算实例,Oracle Linux 7.9,1OCPU,16G内存:
$ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.9 (Maipo)$ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte O…
第一次使用spring boot starter项目遇到的问题,记录下
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/springframework/boot/SpringApplication has been compiled by a more recent version of the Java Runtime (class fi…