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极简解法(C语言)

解题思路:注意事项:参考代码:#includeintmain(){intn,sum=0,a=0;scanf("%d",&n);for(inti=1;i<=n;i++){a=a*10+2;sum=sum+a;}printf("%d",sum);return0;}

cpp链表合并

解题思路:注意事项:参考代码:#include#includeusingnamespacestd;classPerson{public:Person(intnum,intscore){this->m_num=num;this->m_score=score;}intm_n