题解 | #数列求和#
数列求和
https://www.nowcoder.com/practice/6893484c04c24bfca1f606b1823a468d
public class Main {
public static void main(String[] args) {
//write your code here........
long sum = 0;
for (long i = 9; i <= 9999999999l;){
sum += i;
i = i * 10 + 9;
}
System.out.print(sum);
}
}
