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() {
// write your code here......
long long sum = 0;
int i = 1;
long long n = 0;
while(i<=10)
{
n = 9 + n*10;
sum = sum + n;
i++;
}
printf("%lld",sum);
return 0;
}
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