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