题解 | #规律数列求和#
规律数列求和
https://www.nowcoder.com/practice/e05d1c142b3d4898be7183289a00ce5f
#include <iostream> using namespace std; int main(){ long num=0,sum=0; for(int i=1; i<=10; i++) { num=num*10+9; sum+=num; } cout<<sum; return 0; }
规律数列求和
https://www.nowcoder.com/practice/e05d1c142b3d4898be7183289a00ce5f
#include <iostream> using namespace std; int main(){ long num=0,sum=0; for(int i=1; i<=10; i++) { num=num*10+9; sum+=num; } cout<<sum; return 0; }
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