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 = 10; i <= 10000000000L; i *= 10) {
sum += i - 1;
}
System.out.println(sum);
}
}
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