题解 | #[NOIP2015]金币#
[NOIP2015]金币
https://www.nowcoder.com/practice/8f71f5670e6a45118d24d13868a2da9e
import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int k = sc.nextInt(); int sum = 0; int day = 0; for (int i = 1; i <= k; i++) { //表示要发放的天数 for (int j = 1 ; j <= i; j++) { sum += i; day++; //每次累加完判断一下 if (day == k) { System.out.print(sum); break; } } } } }