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......
int i;//控制次数
long long int t = 1;
int j;
long long int sum = 0;
for (i = 1; i <=10; i++)
{
t = t * 10;
sum = sum + t - 1;
}
cout << sum;
return 0;
}
