摘要：
就是枚举+ 全排列一开始写复杂了，只要每次传进去写三次+-* 就行了题目：Problem I23 Out of 5Input: standard inputOutput: standard outputTime Limit: 1 secondMemory Limit: 32 MBYour task is to write a program that can decide whether you can find an arithmetic expression consisting of five given numbers (1 {1,2,3,4,5} is a bijective fun 阅读全文