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) {
String stringNum = "";
long num = 0;
//write your code here........
for(int i =0; i<10; i++){
stringNum += "9";
num += Long.parseLong(stringNum);
}
System.out.print(num);
}
}
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